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My Singing Monsters

Some monsters occupy multiple beds. When you need more beds, upgrade the castle.

Description

The Castle is a Structure that allows for Monsters to be placed on an Island - each castle provides a certain number of beds for monsters. Aside from Gold Island, Wublin Island, Tribal Island, Celestial Island, Composer Island, and The Colossingum, each island starts with the same Basic Castle and the progression through the castles is the same, with the same number of beds for each level of castle (the number of beds per castle is increased on Ethereal Island, due to the fact that Ethereal Monsters occupy large numbers of beds), but the time and cost required and Experience granted for each upgrade differs based on the island. Gold Island has a single castle - the Crystal Castle - which does not have a bed limit, and cannot be upgraded. Composer Island also has a single special Castle, and every monster takes up one bed, except Glowbes, which take up no beds.

There are two mini-games that you can play from the Castle.

Song

Instruments: Electric bass (Natural), Bass/Sub-bass synth (Fire, Psychic, Bone and Ethereal), Baritone synth (Faerie and Light), Tanpura (Sanctum), Acoustic bass/Brass ensemble (Shanty)

VST(s): Unknown (Fire Islands & Psychic), Halion Sonic (Faerie, Bone, and Light Islands), Kontakt Factory (Seasonal Shanty)

An upgraded castle (Modest Castle and up) produces an electric bass sound. No bass sound can be heard in Gold Island, Composer Island, Shugabush Island, or Amber Island though. This does not happen in Shugabush Island as the Shugabass replaces the Castle's musical role. In Fire Haven, Fire Oasis, Psychic Island, and Bone Island, it plays a bass/sub-bass synth. In Faerie Island and Light Island, it plays a baritone synth. In Magical Sanctum it plays a low tanpura sound. In Seasonal Shanty, it plays brass sounds similar to Sooza in addition to its acoustic bass.

Without Castles, Wublin, Tribal, and Celestial Island do not have a Castle's bassline.

Castles

Common Castles

In the following table, the number of beds shown is given as the number on all islands except Ethereal, followed by a slash and the number of beds on Ethereal Island.

Castle Image Castle Beds
Basic Castle.png Basic Castle
Singing takes a lot of energy, and monsters need sleep! The Basic Castle really isn't very comfy at all; the rain gets through, it's drafty, and cramped.
4/20
Modest Castle.png Modest Castle
It's great to have a good night's sleep! The Modest Castle is dry and warm, but small.
10/45
Comfortable Castle.png Comfortable Castle
Ah, some elbow room! The Comfortable Castle even has indoor plumbing.
18/80
Spacious Castle.png Spacious Castle
The Spacious Castle has lots of room for monsters to relax and refresh.
28/125
Luxurious Castle.png Luxurious Castle
It just doesn't get any better than this! The Luxurious Castle has everything a monster might enjoy, from cold slime pools to dark, nasty dungeons. Who would ever want to leave?
40/175
Extravagant Castle.png Extravagant Castle
This state of the art domicile goes way overboard when it comes to spoiling the monsters...  Personal assistants to wait on them hand and foot (at least those that have hands and feet), the spiffiest sound systems on the monster market...  They've got it made in the shade.
60/265
Paradise Castle.png Paradise Castle
After agreeing that more beds equals more fun, the monsters set out to create the most capacious castle ever - and what better inspiration than Gold Island's own Crystal Castle? Following extensive study of the original architectural marvel, the multiverse's finest architects were tapped to craft the new castle in its image. After the smoke cleared, there was no question - this is the be-all and end-all of monster living arrangements. Welcome to paradise!
90/400

Crystalline Castles

Crystalline Castle upgrades were added in the 2.4.1 update and were originally only available on the Natural Islands, with Crystalline Castles for Haven and Oasis releasing in the 3.4.0 update, and for the Magical Islands during version 3.5.0 on Jun 29th, 2022. These upgrades allow at least one of each monster to be on the island at once, with the maximum bed space at the final upgrade being 180. Each castle is unique, sporting the color and features of the island, as well as the element it represents. The descriptions of the castles state that they were built using the crystals from the Dawn of Fire (when the islands were simply the elemental lands of the Continent), and said crystals are visible on the top pillars. Each castle has the crystal from the elemental land the island represents: Plant Island’s Crystalline Castle has Vegidian crystals, Cold Island’s has Frozium, and so on. There are three natural crystals on the first Crystalline Castle upgrade, with two polished crystals being added on the second, and one carved crystal on the third. Each island’s crystalline castle costs 20 more diamonds than the previous island’s castle. To upgrade the Crystalline Castle further, it will cost 80 more diamonds than level 1 for the second level and 160 more than that for the third. (Plant Island’s castle takes 80 diamonds for level 1, 160 for level 2, and 320 for level 3. Cold Island’s take 100 diamonds for level 1, 180 for level 2, and 340 for level 3. This keeps going up throughout the natural/fire islands.)

Castle Image Castle Beds
Plant Island
Vegidian Castle.png Vegidian Castle
Thanks to mineralogical acumen supplied by Fire Monsters, Plant Island's residents knew exactly where to dig to find vast deposits of Vegidian, a crystal once found in abundance back when the island was an Elemental Land of the prehistoric Continent. Combining the raw strength of the crystal with modern lapidarian techniques has resulted in this magnificent Castle, furnished with more Beds than ever before.
120
Polished Vegidian Castle.png Polished Vegidian Castle

Description is the same as Vegidian Castle

150
Carved Vegidian Castle.png Carved Vegidian Castle

Description is the same as Vegidian Castle

180
Cold Island
Frozium Castle.png Frozium Castle
Thanks to mineralogical acumen supplied by Fire Monsters, Cold Island's residents knew exactly where to dig to find vast deposits of Frozium, a crystal once found in abundance back when the island was an Elemental Land of the prehistoric Continent. Combining the raw strength of the crystal with modern lapidarian techniques has resulted in this magnificent Castle, furnished with more Beds than ever before.
120
Polished Frozium Castle.png Polished Frozium Castle

Description is the same as Frozium Castle

150
Carved Frozium Castle.png Carved Frozium Castle

Description is the same as Frozium Castle

180
Air Island
Skylite Castle.png Skylite Castle
Thanks to mineralogical acumen supplied by Fire Monsters, Air Island's residents knew exactly where to dig to find vast deposits of Skylite, a crystal once found in abundance back when the island was an Elemental Land of the prehistoric Continent. Combining the raw strength of the crystal with modern lapidarian techniques has resulted in this magnificent Castle, furnished with more Beds than ever before.
120
Polished Skylite Castle.png Polished Skylite Castle

Description is the same as Skylite Castle

150
Carved Skylite Castle.png Carved Skylite Castle

Description is the same as Skylite Castle

180
Water Island
Aquanine Castle.png Aquanine Castle
Thanks to mineralogical acumen supplied by Fire Monsters, Water Island's residents knew exactly where to dig to find vast deposits of Aquanine, a crystal once found in abundance back when the island was an Elemental Land of the prehistoric Continent. Combining the raw strength of the crystal with modern lapidarian techniques has resulted in this magnificent Castle, furnished with more Beds than ever before.
120
Polished Aquanine Castle.png Polished Aquanine Castle

Description is the same as Aquanine Castle

150
Carved Aquanine Castle.png Carved Aquanine Castle

Description is the same as Aquanine Castle

180
Earth Island
Stonyx Castle.png Stonyx Castle
Thanks to mineralogical acumen supplied by Fire Monsters, Earth Island's residents knew exactly where to dig to find vast deposits of Stonyx, a crystal once found in abundance back when the island was an Elemental Land of the prehistoric Continent. Combining the raw strength of the crystal with modern lapidarian techniques has resulted in this magnificent Castle, furnished with more Beds than ever before.
120
Polished Stonyx Castle.png Polished Stonyx Castle

Description is the same as Stonyx Castle

150
Carved Stonyx Castle.png Carved Stonyx Castle

Description is the same as Stonyx Castle

180
Fire Islands
Pyrozite Castle.png Pyrozite Castle
Because of their prolonged separation from the surface, and time spent underground, Fire Monsters became the resident mineralogical experts of the Monster World. While such crystals as Vegedian and Frozium still exist in copious quantities if you know where to look, the Fire Element's crystal, Pyrozite, is far rarer - only a few meager veins have survived to the current day. Luckily, the Monsters were able to scrounge together just enough from the area near the living core to fashion two Castles for the Fire Islands, with enough Beds to support their growing populations.
120
Polished Pyrozite Castle.png Polished Pyrozite Castle

Description is the same as Pyrozite Castle

150
Carved Pyrozite Castle.png Carved Pyrozite Castle

Description is the same as Pyrozite Castle

180
Light Island
Confettite Castle.png Confettite Castle
Even though Confettite is among the ancient Crystals that once erupted forth from the world beyond the Prism Gate, it luckily still behaves in mineralogically expectable ways! With the guidance of the local Fire delegation, the inhabitants of Light Island gleaned how to build a series of glorious Confettite Castles, ones which perfectly complement the local color palette and provide the beds needed for the island's growing population.
120
Polished Confettite Castle.png Polished Confettite Castle

Description is the same as Confettite Castle

150
Carved Confettite Castle.png Carved Confettite Castle

Description is the same as Confettite Castle

180
Psychic Island
Nebulox Castle.png Nebulox Castle
Even though Nebulox is among the ancient Crystals that once erupted forth from the world beyond the Prism Gate, it luckily still behaves in mineralogically expectable ways! With the guidance of the local Fire delegation, the inhabitants of Psychic Island gleaned how to build a series of glorious Nebulox Castles, ones which perfectly complement the local color palette and provide the beds needed for the island's growing population.
120
Polished Nebulox Castle.png Polished Nebulox Castle

Description is the same as Nebulox Castle

150
Carved Nebulox Castle.png Carved Nebulox Castle

Description is the same as Nebulox Castle

180
Faerie Island
Aurorium Castle.png Aurorium Castle
Even though Aurorium is among the ancient Crystals that once erupted forth from the world beyond the Prism Gate, it luckily still behaves in mineralogically expectable ways! With the guidance of the local Fire delegation, the inhabitants of Faerie Island gleaned how to build a series of glorious Aurorium Castles, ones which perfectly complement the local color palette and provide the beds needed for the island's growing population.
120
Polished Aurorium Castle.png Polished Aurorium Castle

Description is the same as Aurorium Castle

150
Carved Aurorium Castle.png Carved Aurorium Castle

Description is the same as Aurorium Castle

180
Bone Island
Quarritz Castle.png Quarritz Castle
Even though Quarritz is among the ancient Crystals that once erupted forth from the world beyond the Prism Gate, it luckily still behaves in mineralogically expectable ways! With the guidance of the local Fire delegation, the inhabitants of Cave Island gleaned how to build a series of glorious Quarritz Castles, ones which perfectly complement the local color palette and provide the beds needed for the island's growing population.
120
Polished Quarritz Castle.png Polished Quarritz Castle

Description is the same as Quarritz Castle

150
Carved Quarritz Castle.png Carved Quarritz Castle

Description is the same as Quarritz Castle

180

Other Castles

Some Islands' Castles cannot be upgraded and are already at maximum, and Amber Island's castle has to be upgraded with relics.

These castles are exclusive to one island each.

Castle Image Castle Beds
Gold Island
Crystal Castle.png Crystal Castle
Although shaped like a castle, this mysterious structure actually serves as the main power generator in the monster dimension of the multiverse!  It's from here that monsters derive their musical inspiration, as well as their tireless energy so that they can keep singing forever!
Unlimited
Composer Island
Composer Castle.png Composer Castle
The Castle on Composer Island is styled after another famous Structure in the Monster World, but the similarity is more than skin deep! Just as the Crystal Castle serves as a power generator for Gold Island, the Composer Castle acts as a powerful transmitter for the creative energies flowing in from the human universe - it's got some of the Seam's best upload/download speeds!


Note: Monsters (excluding Glowbes) on Composer Island only take up 1 Bed, meaning a total of 40 Monsters can be placed.

40*
Amber Castle
Amber Castle.png Amber Castle

Unsurprisingly, the Castle of Amber Island is bound by the same peculiar physics of the higher plane as Gold Island's Crystal Castle, and arranges itself in the same multi-faceted, crystalline structure as it grows skyward. What is different, of course, is the building material: hardened sap from the multiverse's World Tree, the Stablo Mjehurića, that preserves musical musings in coagulated Relic form. As more Relics are donated to its expansion, more beds become available for the Fire Monsters of Amber Island to take up residence.

90

Upgrade costs

Cost and time to upgrade the Castle varies by Island.

Plant Island

Castle Cost Time XP Beds
Modest Castle 500 Coins 20 seconds 375 XP.png 10
Comfortable Castle 3,000 Coins 1 hour 750 XP.png 18
Spacious Castle 15,000 Coins 4 hours 3,750 XP.png 28
Luxurious Castle 30,000 Coins 6 hours 7,500 XP.png 40
Extravagant Castle 20 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 40 Diamonds 16 hours 28,000 XP.png 90
Vegidian Castle 80 Diamonds 1 day 56,000 XP.png 120
Polished Vegidian Castle 160 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Vegidian Castle 320 Diamonds 1 day, 16 hours 224,000 XP.png 180

Cold Island

Castle Cost Time XP Beds
Modest Castle 50,000 Coins 8 hours 12,500 XP.png 10
Comfortable Castle 100,000 Coins 10 hours 25,000 XP.png 18
Spacious Castle 250,000 Coins 12 hours 62,500 XP.png 28
Luxurious Castle 500,000 Coins 14 hours 125,000 XP.png 40
Extravagant Castle 25 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 50 Diamonds 16 hours 28,000 XP.png 90
Frozium Castle 100 Diamonds 1 day 56,000 XP.png 120
Polished Frozium Castle 200 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Frozium Castle 400 Diamonds 1 day, 16 hours 224,000 XP.png 180

Air Island

Castle Cost Time XP Beds
Modest Castle 100,000 Coins 16 hours 250,000 XP.png 10
Comfortable Castle 400,000 Coins 18 hours 375,000 XP.png 18
Spacious Castle 1,200,000 Coins 20 hours 625,000 XP.png 28
Luxurious Castle 2,400,000 Coins 22 hours 1,000,000 XP.png 40
Extravagant Castle 30 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 60 Diamonds 16 hours 28,000 XP.png 90
Skylite Castle 120 Diamonds 1 day 56,000 XP.png 120
Polished Skylite Castle 240 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Skylite Castle 480 Diamonds 1 day, 16 hours 224,000 XP.png 180

Water Island

Castle Cost Time XP Beds
Modest Castle 250,000 Coins 24 hours 1,625,000 XP.png 10
Comfortable Castle 1,000,000 Coins 26 hours 1,875,000 XP.png 18
Spacious Castle 3,000,000 Coins 28 hours 2,125,000 XP.png 28
Luxurious Castle 6,000,000 Coins 30 hours 2,312,500 XP.png 40
Extravagant Castle 35 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 70 Diamonds 16 hours 28,000 XP.png 90
Aquanine Castle 140 Diamonds 1 day 56,000 XP.png 120
Polished Aquanine Castle 280 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Aquanine Castle 560 Diamonds 1 day, 16 hours 224,000 XP.png 180

Earth Island

Castle Cost Time XP Beds
Modest Castle 750,000 Coins 32 hours 2,937,500 XP.png 10
Comfortable Castle 2,250,000 Coins 34 hours 3,312,500 XP.png 18
Spacious Castle 4,500,000 Coins 36 hours 3,750,000 XP.png 28
Luxurious Castle 6,750,000 Coins 48 hours 4,187,500 XP.png 40
Extravagant Castle 40 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 80 Diamonds 16 hours 28,000 XP.png 90
Stonyx Castle 160 Diamonds 1 day 56,000 XP.png 120
Polished Stonyx Castle 320 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Stonyx Castle 640 Diamonds 1 day, 16 hours 224,000 XP.png 180

Fire Haven

Castle Cost Time XP Beds
Modest Castle 1,000,000 Coins 16 hours 250,000 XP.png 10
Comfortable Castle 3,000,000 Coins 18 hours 375,000 XP.png 18
Spacious Castle 6,000,000 Coins 20 hours 625,000 XP.png 28
Luxurious Castle 9,000,000 Coins 22 hours 1,000,000 XP.png 40
Extravagant Castle 30 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 60 Diamonds 16 hours 28,000 XP.png 90
Pyrozite Castle 150 Diamonds 1 day 56,000 XP.png 120
Polished Pyrozite Castle 300 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Pyrozite Castle 600 Diamonds 1 day, 16 hours 224,000 XP.png 180

Fire Oasis

Castle Cost Time XP Beds
Modest Castle 1,500,000 Coins 16 hours 250,000 XP.png 10
Comfortable Castle 4,500,000 Coins 18 hours 375,000 XP.png 18
Spacious Castle 9,000,000 Coins 20 hours 625,000 XP.png 28
Luxurious Castle 13,500,000 Coins 22 hours 1,000,000 XP.png 40
Extravagant Castle 32 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 64 Diamonds 16 hours 28,000 XP.png 90
Pyrozite Castle 175 Diamonds 1 day 56,000 XP.png 120
Polished Pyrozite Castle 350 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Pyrozite Castle 700 Diamonds 1 day, 16 hours 224,000 XP.png 180

Light Island

Castle Cost Time XP Beds
Modest Castle 1,625,000 Coins 24 hours 1,625,000 XP.png 10
Comfortable Castle 4,875,000 Coins 26 hours 1,875,000 XP.png 18
Spacious Castle 9,750,000 Coins 28 hours 2,125,000 XP.png 28
Luxurious Castle 14,625,000 Coins 30 hours 2,312,500 XP.png 40
Extravagant Castle 34 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 68 Diamonds 16 hours 28,000 XP.png 90
Confettite Castle 150 Diamonds 1 day 56,000 XP.png 120
Polished Confettite Castle 300 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Confettite Castle 600 Diamonds 1 day, 16 hours 224,000 XP.png 180

Psychic Island

Castle Cost Time XP Beds
Modest Castle 1,750,000 Coins 24 hours 1,625,000 XP.png 10
Comfortable Castle 5,250,000 Coins 26 hours 1,875,000 XP.png 18
Spacious Castle 10,500,000 Coins 28 hours 2,125,000 XP.png 28
Luxurious Castle 15,750,000 Coins 30 hours 2,312,500 XP.png 40
Extravagant Castle 36 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 72 Diamonds 16 hours 28,000 XP.png 90
Nebulox Castle 160 Diamonds 1 day 56,000 XP.png 120
Polished Nebulox Castle 320 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Nebulox Castle 640 Diamonds 1 day, 16 hours 224,000 XP.png 180

Faerie Island

Castle Cost Time XP Beds
Modest Castle 1,875,000 Coins 24 hours 1,625,000 XP.png 10
Comfortable Castle 5,625,000 Coins 26 hours 1,875,000 XP.png 18
Spacious Castle 11,250,000 Coins 28 hours 2,125,000 XP.png 28
Luxurious Castle 16,875,000 Coins 30 hours 2,312,500 XP.png 40
Extravagant Castle 38 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 76 Diamonds 16 hours 28,000 XP.png 90
Aurorium Castle 170 Diamonds 1 day 56,000 XP.png 120
Polished Aurorium Castle 340 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Aurorium Castle 680 Diamonds 1 day, 16 hours 224,000 XP.png 180

Bone Island

Castle Cost Time XP Beds
Modest Castle 2,000,000 Coins 24 hours 1,625,000 XP.png 10
Comfortable Castle 6,000,000 Coins 26 hours 1,875,000 XP.png 18
Spacious Castle 12,000,000 Coins 28 hours 2,125,000 XP.png 28
Luxurious Castle 18,000,000 Coins 30 hours 2,312,500 XP.png 40
Extravagant Castle 40 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 80 Diamonds 16 hours 28,000 XP.png 90
Quarritz Castle 180 Diamonds 1 day 56,000 XP.png 120
Polished Quarritz Castle 360 Diamonds 1 day, 8 hours 112,000 XP.png 150
Carved Quarritz Castle 720 Diamonds 1 day, 16 hours 224,000 XP.png 180

Shugabush Island

Castle Cost Time XP Beds
Modest Castle 50,000 Coins 8 hours 12,500 XP.png 10
Comfortable Castle 100,000 Coins 10 hours 25,000 XP.png 18
Spacious Castle 250,000 Coins 12 hours 62,000 XP.png 28
Luxurious Castle 500,000 Coins 14 hours 125,000 XP.png 40
Extravagant Castle 30 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 60 Diamonds 16 hours 28,000 XP.png 90

Seasonal Shanty

Castle Cost Time XP Beds
Modest Castle 50,000 Coins 8 hours 12,500 XP.png 10
Comfortable Castle 100,000 Coins 10 hours 25,000 XP.png 18
Spacious Castle 250,000 Coins 12 hours 62,000 XP.png 28
Luxurious Castle 500,000 Coins 14 hours 125,000 XP.png 40
Extravagant Castle 30 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 60 Diamonds 16 hours 28,000 XP.png 90

Ethereal Island

Castle Cost Time XP Beds
Modest Castle 525 Shards 12 hours 375 XP.png 45
Comfortable Castle 800 Shards 14 hours 750 XP.png 80
Spacious Castle 1,375 Shards 16 hours 3,750 XP.png 125
Luxurious Castle 2,250 Shards 18 hours 7,500 XP.png 175
Extravagant Castle 30 Diamonds 8 hours, 20 minutes 14,000 XP.png 265
Paradise Castle 60 Diamonds 16 hours 28,000 XP.png 400

Magical Sanctum

Castle Cost Time XP Beds
Modest Castle 525 Shards 8 hours 375 XP.png 10
Comfortable Castle 800 Shards 10 hours 750 XP.png 18
Spacious Castle 1,375 Shards 12 hours 3,750 XP.png 28
Luxurious Castle 2,250 Shards 14 hours 7,500 XP.png 40
Extravagant Castle 30 Diamonds 8 hours, 20 minutes 14,000 XP.png 60
Paradise Castle 60 Diamonds 16 hours 28,000 XP.png 90

Amber Island

Castle Cost Time XP Beds
Level 2 10 Relics 1 day, 4 hours 12,500 XP.png 10
Level 3 20 Relics 1 day, 8 hours 25,000 XP.png 18
Level 4 40 Relics 16 hours 62,500 XP.png 28
Level 5 75 Relics 18 hours 125,000 XP.png 40
Level 6 115 Relics 1 day, 16 hours 14,000 XP.png 60
Level 7 180 Relics 1 day, 20 hours 500,000 XP.png 90

Castle and Hotel Beds

MSM messages Monster placement.png

The number of Monsters you can place on the Island depends on how many Beds they take up, and how many Beds are available in the Castle.

A further number of Monsters may be placed in the optional Hotel Structure, with its own limit on number of Beds.

When you attempt to place a Monster from the Nursery Structure onto the Island, but there aren't enough Beds available in the Castle, you may receive one of the following messages:

  • If you do not have a Hotel, and...
    • your Castle is not fully upgraded: "Your Castle does not have enough Beds. Go to Castle to upgrade now?" This is accompanied with a button that causes the Castle to be selected so you can easily upgrade it.
    • your Castle is fully upgraded: "Your Castle is fully upgraded and does not have enough Beds.". This means you will be unable to place the Monster on the Island without either constructing a Hotel first, or removing enough Monsters from the Island to free up the number of Beds required.
  • If you do have a Hotel, and it has enough Beds available, and...
    • your Castle is not fully upgraded: "Your Castle does not have enough Beds. You can go to the Castle to upgrade it or check in to the Hotel." This provides two buttons: One to go and upgrade your Castle, and the other allowing you to check the Monster straight into the Hotel without the need to place it on the Island first.
    • your Castle is fully upgraded: "Your Castle is fully upgraded and does not have enough Beds. Check in to Hotel?", which provides only the button to check the Monster straight into the Hotel.
  • If you do have a Hotel, but it does not have enough Beds available, and...
    • your Castle is not fully upgraded: "Your Castle does not have enough Beds and your Hotel is full. Go to Castle to upgrade now?", which only lets you go to the Castle to upgrade it.
    • your Castle is fully upgraded: "Your fully upgraded Castle does not have enough Beds and your Hotel is full." This means you will be unable to place the Monster on the Island, nor check it into the Hotel, requiring you to remove enough Monsters from the Island to free up the number of Beds required

Note that this game mechanic, introduced in version 2.4.1, does not provide a button to go upgrade your Hotel, if your Hotel does not have enough Beds available but could be upgraded, nor does it suggest Buying a Hotel if you do not have one (but could Buy one, requiring Level 15).

It also does not check if your Island has enough physical space (see Island Grid Planning) for the Monster to be placed, which means that if you have enough Beds on the Island and enough Beds in the Hotel, but there's no free space on the Island to actually fit the Monster, you will not be shown the option to place it in the Hotel instead; you will have to make space on the Island.

Notes

  • When first introduced, the Extravagant Castle had a maximum of 52 beds. However with the update to version 1.1.3, the maximum beds was increased to 60.
  • The castle on Shugabush Island does not produce any bass sound. Instead, Shugabass produce a bass sound. The same applies for Amber Island because Sneyser plays the bass instead since it plays long notes instead of short ones like on Fire Oasis, though not playing as much.
  • The Vita version of the game currently does not include the Paradise Castle. However, the Big Fish version does.
  • For a long time, there was a hint of a new castle being added. The hint could be viewed from the log-on screen hints and tips. It said, "The Extravagant Castle is the Maximum Castle. For now."  This hint has now been realized in the Paradise Castle.
  • Costs for Extravagant and Paradise Castles in Water and Earth Islands increased after the Anniversary Month Celebration ended in 2014. Instead of each of the Extravagant Castles costing 30 Diamond25px.png, they now cost 35 Diamond25px.png in Water Island and 40 Diamond25px.png in Earth Island. The Paradise Castles cost 70 Diamond25px.png and 80 Diamond25px.png respectively.
  • The castle on Ethereal Island has more beds than the natural islands, due to the fact that Ethereal monsters take up more beds than usual.
  • The castle on Composer Island is a Paradise Castle with only 40 beds. However, all monsters on Composer Island except the Glowbe occupy one bed. (Glowbes occupy zero beds.)
  • Although the game states that Monsters sleep in the castle, they do not go to sleep by themselves, and when muted do not go into the castle.
  • The Castle on Psychic Island was the only non-upgraded Castle to play sound. It was confirmed by the Monster-Handlers to be a bug and was later fixed.
  • The Crystalline Castles were added to the game on June 3rd, 2020. They are based off of the Crystals from Dawn of Fire. The Crystalline Castles are likely not called Crystal Castles to avoid confusion with Gold Island’s Crystal Castle.
  • Upgrading to a Crystalline Castle presents a warning reading "Warning: Using the maximum number of Beds in the next Castle upgrade may result in some sound and performance issues on older devices. Continue?"
  • Prior to Update 2.4.1, Composer Island’s castle was just a Paradise Castle. However, this was changed in the update, probably to not confuse players.
  • When boxing a monster on Gold Island, the Bed count of the monster's original island will not update until you return there.
  • The Magical Island crystalline castles confirmed the Magical Islands association with the Outer Islands inside of Dawn of Fire, although known about for several years, this was a more formal mentioning of their association.

    The Magical crystalline castles and their associated Outer Island from Dawn of Fire.

Structures
Luxurious Castle.png Breeding Structure.png Nursery.png Bakery.png Mini-Mine.png Maximum Mine.png
Castle Breeding Structure Nursery Bakery Mini-Mine Maximum Mine
Wishing Torch Plant.png Fuzer.png Time Machine.png Recording Studio.png Unity Tree.png Storage Shed.png
Wishing Torch Fuzer Time Machine Recording Studio Unity Tree Storage Structure
Humble Hotel.png Conservatory.png Mess Hall.png Crucible - Flags furled.png
Hotel Structure Conservatory Mess Hall Crucible
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