Gul' Ruk, Thought Thief

Deathtouch
Whenever you discard a card, you may return
target nonland permanent from a graveyard
to the battlefield under your control, only
if that permanent shares the same converted
mana cost as the discarded card.
{t}{x}, sacrifice a permanent: Each player discards
a nonland Permanent with converted mana cost
X or less from their hand.