| “ | After vanishing into the Prism Gate during the Dawn of Fire, the long-lost Outer Islands have finally been found - and they've crash landed in the Mirror timeline! The crystalline growths that encrusted Cave Island wasted no time overtaking the cavernous chasms of the Bone Titan, Necrull. Every nook, cranny and crevice has been speared with a stalagmite or skewered by stalactites. With so many glimmering gems reflecting what little light can reach them, this dank dwelling has been illuminated to levels never observed before! Unfortunately, this has shone a light upon the growing fungal infection in Necrull's ear - but it's under control, they promise. | ” |
| — In-game description |
About[]
Mirror Bone Island 
is the ninth Mirror Island and the fourth and final Mirror Magical Island. It can be bought for 1,000 
when the player has reached Level 21, like the other Mirror Magical Islands.
Song Table[]
This is a chart that shows where each Monster plays in the song. Each part is 16 beats long, meaning that one part is around 6 seconds long. The number next to each Monster indicates which track is being played at each part. The Mirror Magical Islands were released with remixed songs, including Mirror Bone Island. However, the tracks that play are the same ones from Bone Island.
| Mirror Bone Island Song
| |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
 1
|
1
|
2
| |||||||||||||||||||||
 1
|
1
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 1
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 1
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1
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1
|
2
| |||||||||||||||||||
 1
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2
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1
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2
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1
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2
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1
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2
|
 1
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 1
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1
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2
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 1
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1
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2
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3
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2
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3
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2
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3
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2
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3
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 1
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3
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1
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1
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2
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 1
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1
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1
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 1
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 1
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 1
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 1
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1
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 1
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 1
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1
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 1
| |||||||||||||||||||||
 1
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2
|
||||||||||||||||||||||
 1
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1
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1
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 2
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2
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1
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 1
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2
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1
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2
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2
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 1
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2
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1
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2
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2
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Special Features[]
Obstacles[]
Removing the rocks and trees from the island earns the player Experience (
) and it opens up space to place more Monsters, Decorations, or Structures. Removed obstacles are not gone permanently; they can be bought back with Diamonds () under the decorations section in the Market. In total, it costs 2,215,000 
to remove all obstacles from the island.
| Obstacles | |||||
|---|---|---|---|---|---|
|
|
|
|
|
|
| Small Mirror Tree Cost: 1 Removal: 3,500 Time: 7 hours |
Medium Mirror Tree Cost: 3 Removal: 22,500 Time: 15 hours |
Big Mirror Tree Cost: 5 Removal: 32,500 Time: 22 hours |
Small Mirror Rock Cost: 2 Removal: 8,000 Time: 9 hours |
Medium Mirror Rock Cost: 5 Removal: 90,000 Time: 23 hours |
Big Mirror Rock Cost: 10 Removal: 130,000 Time: 1 day, 3 hours |
Version History[]
| Date | Added Monster(s) | Version | Updates Song? |
|---|---|---|---|
| October 9th, 2024 |                          
|
4.5.0 | 
|
| October 16th, 2024 |    
|
4.5.0 |
|
| October 17th, 2024 |  
|
4.5.0 | 
|
| October 30th, 2024 | 
|
4.5.0 |
|
| October 31st, 2024 |  
|
4.5.0 |
|
| November 6th, 2024 | 
|
4.5.0 |
|
| November 7th, 2024 |            
|
4.5.0 |
|
| November 28th, 2024 |  
|
4.5.2 |
|
| March 5th, 2025 | 
|
4.7.1 |
|
| April 30th, 2025 | 
|
4.8.1 |
|
| July 9th, 2025 | 
|
4.8.4 |
|
| July 23rd, 2025 | 
|
4.8.4 |
|
| July 30th, 2025 | 
|
4.8.4 |
|
| October 15th, 2025 | 
|
5.0.0 |
|
| October 29th, 2025 | 
|
5.1.0 |
|
Gallery[]
Notes[]
- Mirror Bone Island contains one half of Cave Island from Dawn of Fire, along with the Cave Island-themed Decorations. This is also the same with the other Mirror Magical Islands, being Party-Light, Space-Psychic, Cloud-Faerie, and Cave-Bone.
- Its bio references the Dank Dwelling decoration from Dawn of Fire, which can be found on the left side of the Island.
- Mirror Bone Island is currently the most expensive Mirror Island at 1,000 Diamonds. This also makes it the most expensive Island in the game.
- Its discount price is as much as Mirror Earth Island (the previously most expensive Mirror Island) at full price.
- Mirror Bone Island's grid is different from its normal version.
| Map | Island Skins | Grid Planning | Teleporting | Conundrum | Colossals/Titans | Monster World | Translations |
|---|