Kathril, PhD

When Kathril, Aspect Warper enters, put a flying counter on any creature you control if a creature card in your graveyard has flying.
Repeat this process for first strike, double strike, deathtouch, hexproof, indestructible, lifelink, menace, reach, trample,
and vigilance. Then put a +1/+1 counter on Kathril for each counter put on a creature this
way.