Avengers Annual #10 (9.0)

1st appearance of Rogue

1st cover appearance of Mystique

1st and only appearance of a girl named Maddy Pryor, not to be confused with Madelyne Pryor aka the Goblin Queen

BY FRIENDS -- BETRAYED! The first appearance of Rogue! Ms. Marvel lies disoriented and weakened after her powers are absorbed by Rogue. Will Spider-Woman be able to restore her amnesiac friend? Just as the Avengers band together to take care of their fallen teammate, the Brotherhood of Evil Mutants attack!