Phyrexian Metamorph [Double Masters] Goat Hydra As long as Siege Behemoth

As long as Siege Behemoth is attacking

Set: Tenth Edition Type: Sorcery Rarity: Uncommon Cost: {1}{G} Search your library for a land card

nonland card

Set: Hour of Devastation Prerelease Promos Type: Legendary Creature — God Rarity: Mythic Cost: {3}{B}{R} Whenever a creature with a -1/-1 counter on it dies

They can't be regenerated

Phyrexian Metamorph [Double Masters] Goat Hydra As long as Siege BehemothSet: Double Masters Type: Artifact Creature Phyrexian Shapeshifter Rarity: Rare Cost: {3}{U P} ({U P} can be paid with either {U} or 2 life.) You may have Phyrexian Metamorph enter the battlefield as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types.