Ace Ventura, Pet Detective

Indestructible
When Ace Ventura, Pet Detective enters the battlefield, search your library for a creature
card with converted mana cost {x} or less, reveal it,
then put it in your hand. Then choose one:
Swap that card with target creature card in an opponent's graveyard, or, that card
gains your choice of lifelink, trample, affinity for artifacts, or first strike.