Faces of the Beast: The Changing Look of Hank McCoy
In the current arc of All New X-Men, the team's resident big brain Hank McCoy uses his time machine (hey, Henry, could you have mentioned you had that before?) to bring his past self to the present day (in apparent violation of Marvel's own time travel rules, but rules are totally boresville), to brainstorm a cure for his chronic MacGuffinism (a serious medical condition that inspires really smart