Transmute Artifact [Antiquities] Seventh Edition (Piles can be empty

(Piles can be empty

No pilgrimage to Valor's Reach is complete without a stroll through its celebrated shopping district

Howltooth Hollow enters the battlefield tapped

you can't be attacked except by creatures with flying and/or islandwalk

Set: Ice Age Type: Artifact Rarity: Uncommon Cost: {3} {2}

Transmute Artifact [Antiquities] Seventh Edition (Piles can be emptySet: 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.