Nevermore, the Shadow Fiend

Haste
When Nevermore, the Shadow Fiend enters the battlefield, target opponent may search their
library for a creature card and exile it.
If a creature was exiled this way, Nevermore, the Shadow Fiend gains toughness and power equal to
the exiled creature's toughness and power.
If a creature wasn't exiled this way,
deal 20 damage to target opponent.