X-Men: First Class #15 (2008)

Medusa gets amnesia.  

She’s trying to figure out whether she really fits in with Wizard’s evil Frightful Four, and the outcast X-Men help her figure it all out.  They also all fight Wizard. 

Fun issue.  I liked when Medusa was a “villain” type.

Plus, the title of the story is “Bad Hair Day,” which is great.