Transmute Artifact [Antiquities] Swamp Forest Set: HeartGold & SoulSilver: Unleashed

Set: HeartGold & SoulSilver: Unleashed Type: Colorless Rarity: Ultra Rare Retreat cost: Colorless

Set: Black & White: Plasma Freeze Type: Grass Rarity: Holo Rare Retreat cost: Colorless

put a +1/+1 counter on Dirtcowl Wurm

you may pay {B}

tap all lands that player controls that could produce any type of mana that land could produce

Transmute Artifact [Antiquities] Swamp Forest Set: HeartGold & SoulSilver: UnleashedSet: Antiquities Type: Sorcery Rarity: Uncommon Cost: {U}{U} Sacrifice an artifact. If you do, search your library for an artifact card. If that card's mana value is less than or equal to the sacrificed artifact's mana value, put it onto the battlefield. If it's greater, you may pay {X}, where X is the difference. If you do, put it onto the battlefield. If you don't, put it into its owner's graveyard. Then shuffle.