Vasilisa, Koldun Prodigy

Lifelink. Ward {2}
Whenever you cast a curse, demon, devil,
or shaman spell Vasilisa, Koldun Prodigy
deals 1 damage to any target
{u}{b}{r}{t} Sacrifice a creature: Search your
library for a curse with cmc less than or
equal to the cmc of the creature sacrificed
and exile that card. Until end of turn
you may play that card without paying
its mana cost.