Ashiok's Erasure 
Enchantment
Flash When this enchantment enters, exile target spell. Your opponents can't cast spells with the same name as the exiled card. When this enchantment leaves the battlefield, return the exiled card to its owner's hand.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL