Owning up to his moniker, Mister Sinister has a nefarious plan: steal the mutant powers of the X-Men for himself by experimenting with their DNA. At the start of the game, 12 DNA Sample tokens are distributed equally among the Heroes. Mister Sinister is able to attract Heroes towards him, then uses his Master Plan cards, BAM, and Overflow effects to collect their DNA Samples. If a Hero loses all of their DNA Sample tokens, they lose their powers and consider all Special Effects on their cards as blank! If Mister Sinister manages to steal 9 DNA Sample tokens, the Heroes have lost.
https://www.kickstarter.com/projects/cmon/marvel-united-x-men/posts/3166403
