Mystique returns to the Brotherhood with a mentally unstable, but immensely powerful mutant named Wanda Maximoff who was abducted from a mental institution, much to the horror of her twin brother Pietro.
When Mystique returns to the Brotherhood with a mentally unstable, but immensely powerful mutant named Wanda Maximoff who was abducted from a mental institution, she becomes the newest Brotherhood member, much to the horror of her twin brother Pietro. This new addition to the Brotherhood single-handedly defeats the X-Men for the first time.