Impish Opportunist

Haste
{t}, sacrifice Impish Opportunist: Deal 3 damage
to any target.
Whenever a creature deals combat damage to
you, you may exile a card from the top of your
library. At the end of your turn or whenever you
cast a spell exiled this way, put all cards exiled by
Impish Opportunist into your graveyard.
You may cast spells exiled by Impish
Opportunist.