A-Fall of the Impostor 
Enchantment — Saga
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I, II — Put a +1/+1 counter on up to one target creature. III — Exile a creature with the greatest power among creatures target opponent controls.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL