Ajani, Valiant Protector
Aether Revolt — Mythic
Planeswalker — Ajani
Ajani, Valiant Protector rulings:
2/9/2017 : If you don’t have a creature card in your library while resolving Ajani’s second ability, you’ll reveal your library and then randomize it.
2/9/2017 : The value of X for Ajani’s third ability is determined only as it resolves. The number of +1/+1 counters on the creature won’t change later if your life total changes.