Aetherwuld Assassin

Aetheral State {u/b}{u/b} (Return this card to your hand and summon 1/1 Blue/Black Shade creature tokens equal to the number of {e} on this creature)
When Aetherwuld Assassin is summoned, add {e}(Energy Token) and destroy a target creature. The owner of Aetherwuld Assassin may choose to sacrifice any number of Blue/Black Shade creature tokens to draw a card when it is summoned.