Geistblast [Shadows over Innistrad] SWSH081 you may cast a creature

you may cast a creature spell from among cards exiled with Idol of Endurance without paying its mana cost

It can't transform by any other means

Set: Commander Anthology Volume II Type: Artifact Rarity: Uncommon Cost: {2} {T}: Add one mana of any color that a land an opponent controls could produce

Set: The List Type: Instant Rarity: Uncommon Cost: {1}{B} Destroy target nonlegendary creature

leaving flesh palmprints on the icy wall

Geistblast [Shadows over Innistrad] SWSH081 you may cast a creatureSet: Shadows over Innistrad Type: Instant Rarity: Uncommon Cost: {2}{R} Geistblast deals 2 damage to any target. {2}{U}, Exile Geistblast from your graveyard: Copy target instant or sorcery spell you control. You may choose new targets for the copy.