Majestic Auricorn
Creature — Unicorn
Mutate 
(If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Vigilance
Whenever this creature mutates, you gain 4 life.
4/4
イラスト：
Ikoria: Lair of Behemoths#22アンコモン英語