Board Thread:Questions and Answers/@comment-8335247-20130818191211/@comment-25213108-20140825185910

AidanTheMonsterHunter wrote: It would be good if you could send your Monsters down the Mine for 24 Hours (Or maybe you could choose how long you send them for, and the more Monsters you add, the more Diamonds you get). Higher Element Combination monsters could mean more Diamonds (Get 1 from sending a Noggin down the Mine, and 4 from sending Entbrat down the mine). That's a very good idea...... But more realistically: 24 hours for all monsters (or maybe longer for higher element monsters) and a max of 5 monsters down there at a time (or the equivalent of 10 beds eg/ 1 noggin, two entbrats and a mammot = 10 beds)

Or they could just bring back the mine for a week or two like when they bring back Special Edition monsters. Then the people who missed out could get them but it wouldn't have to stay long term.