Ajani Fells the Godsire (19) [Modern Horizons 3]

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Exile target creature an opponent controls with power 3 or greater. II — Create a 2/1 white Cat Warrior creature token, then put a vigilance counter on a creature you control. III — Target creature you control gains double strike until end of turn.