Coldsteel Heart [Commander 2015] Merfolk Rogue or sorcery card with mana

or sorcery card with mana value less than or equal to the number of colors of mana spent to cast this spell

Whenever Phage deals combat damage to a creature

Set: Nemesis Type: Instant Rarity: Rare Cost: {2}{W} If you control a Plains

Set: Visions Type: Land Rarity: Uncommon {T}: Add {C}

Coldsteel Heart [Commander 2015] Merfolk Rogue or sorcery card with manaSet: Commander 2015 Type: Snow Artifact Rarity: Uncommon Cost: {2} Coldsteel Heart enters the battlefield tapped. As Coldsteel Heart enters the battlefield, choose a color. {T}: Add one mana of the chosen color. The Phyrexian death machine awoke, its coldsteel heart imbuing it with sinister new power.