Corrupted Knight

Remember {1}{b}{b} ({1}{b}{b}, exile this card
from your graveyard: Return it to the battlefield
attached to a creature you control, except it's an enchantment Aura in addition to its other subtypes
with enchant creature. Exile it if it would leave the battlefield. Activate this ability only anytime you can
cast a sorcery.)
When Corrupted Knight or enchanted creature attacks, it gets +2/-1 until end of turn.