User blog comment:DirgeOfCerberus111/Cool Mutations/@comment-3341288-20110804001209

Ok here is one. The sus-an membrane organ has been mutated in such way that the Marine is no longer capable of hibernation. However, instead they gain incredible regenerative abilities. He can regrow a lost limb within a few weeks and regrow damaged brain tissue. Even if officially "dead" they may regenerate and rise again. However the down side to this is that they cannot regrow memories and if they take to much damage the may reawaken a blank slate.