Your search for "Heartless Summoning 104" revealed the following:
Heartless Summoning (ISD) from Innistrad, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Anthony Palumbo Card Text:Creature spells you cast cost 2 less to cast.Creatures you control get -1/-1.
Heartless Summoning (Foil) (ISD) from Innistrad, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Anthony Palumbo Card Text:Creature spells you cast cost 2 less to cast.Creatures you control get -1/-1.
Heartless Summoning - Retro Frame (INR) from Innistrad Remastered, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Anthony Palumbo Card Text:Creature spells you cast cost 2 less to cast.Creatures you control get -1/-1.
Heartless Summoning - Borderless (Foil) (INR) from Innistrad Remastered, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Jodie Muir Card Text:Creature spells you cast cost 2 less to cast.Creatures you control get -1/-1.