Gryff Rider
Innistrad: Crimson Vow — Common
Creature — Human Knight
Gryff Rider rulings:
2021-11-19: A creature's training ability triggers only when both that creature and a creature with greater power are declared as attackers. Increasing a creature's power after attackers are declared won't cause a training ability to trigger.
2021-11-19: Once a creature's training ability has triggered, destroying the other attacking creature or reducing its power won't stop the creature with training from getting a +1/+1 counter.


