Coldsteel Heart [Jumpstart 2022] 68a Set: EX: Crystal Guardians Type:

Set: EX: Crystal Guardians Type: Colorless Rarity: Common Retreat cost: Colorless

Underworld Dreams deals 1 damage to that player

It has "Sacrifice this creature: Add C

Set: Sun & Moon: Cosmic Eclipse Type: Darkness Rarity: Secret Rare Retreat cost: Colorless

or land card from their hand onto the battlefield

Coldsteel Heart [Jumpstart 2022] 68a Set: EX: Crystal Guardians Type:Set: Jumpstart 2022 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. "There is as much power in winter's chill as in summer's warmth."