Fear of Forgetting Names 
Enchantment Creature — Nightmare
When this creature enters, target creature loses its name. Creatures you control have protection from creatures with no names.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL