Heartless Summoning 
Enchantment
Creature spells you cast cost 
less to cast.
Creatures you control get -1/-1.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Enchantment
Creature spells you cast cost less to cast.
Creatures you control get -1/-1.