Instant
Manifest the bottom card of your library. That creature gains lifelink and deathtouch until end of turn. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)
“I thought only boggarts would be fools enough to live in swamps. But no, bad taste is universal.”
—Chiara the enchantress