Note : First appearance of Scarlet Witch and Agatha Harkness .
Mystique returns to the Brotherhood with a mentally unstable , but immensely strong and powerful mutant named Wanda Maximoff , much to the horror of her twin brother Pietro .
Note : First appearance of Wanda Maximoff   and Agatha Harkness .
Mystique returns to the Brotherhood with a mentally unstable , but immensely strong and powerful mutant named Wanda Maximoff , much to the horror of her twin brother Pietro .