Koranengel, Zaran's Muse

Whenever a creature's power increases, that
creature gains trample until end of turn. You
gain 1 life.
{1}{u}{r}: Whenever one or more creatures deal
combat damage to a player this turn, exile that
many cards from the top of their controller's
library.Until end of turn, that player may play a
card exiled with Koranengel. (That player still
pays any costs. Timing rules still apply.)