Regal Leosaur
Creature — Dinosaur Cat
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.)
Whenever this creature mutates, other creatures you control get +2/+1 until end of turn.
Ilse Gort
Rulings
Regal Leosaur’s last ability affects only other creatures you control at the time it resolves. Creatures you begin to control later in the turn won’t get +2/+1.
(wotc • 2020-04-17)
Rulings
Regal Leosaur’s last ability affects only other creatures you control at the time it resolves. Creatures you begin to control later in the turn won’t get +2/+1.
(wotc • 2020-04-17)