Locket of Yesterdays 
Artifact
Spells you cast cost less to cast for each card with the same name as that spell in your graveyard.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Artifact
Spells you cast cost less to cast for each card with the same name as that spell in your graveyard.