Worn Powerstone [Duel Decks: Phyrexia vs. the Coalition] Xyz/Effect Monster Scholars are uncertain whether it

Scholars are uncertain whether it was the actual sound or some other magical property of the Elven Lyre that transformed its player

Set: Mirrodin Type: Sorcery Rarity: Rare Cost: {5}{G}{G} Choose one —

Death arrives on tattered wings and stolen bones

Set: Black & White: Noble Victories Type: Grass Rarity: Promo

OR Ritual Summon 1 "Magikey" Ritual Monster from your hand

Worn Powerstone [Duel Decks: Phyrexia vs. the Coalition] Xyz/Effect Monster Scholars are uncertain whether itSet: Duel Decks: Phyrexia vs. the Coalition Type: Artifact Rarity: Uncommon Cost: {3} Worn Powerstone enters the battlefield tapped. {T}: Add {C}{C}. Even a fragment of a powerstone contains within it not just energy, but spacevast dimensions trapped in fragile crystal.