Incubation Triformer [Unknown Event] Cat Snake Set: From the Vault: Twenty

Set: From the Vault: Twenty Type: Artifact Rarity: Mythic Cost: {4} {T}: Add {C}{C}{C}

Set: Arena League 2005 Type: Basic Land — Mountain Rarity: Rare ({T}: Add {R}

Set: Secret Lair Drop Series Type: Artifact Rarity: Rare Cost: {1} Creature cards in graveyards and libraries can't enter the battlefield

Set: Mystery Booster Type: Artifact Rarity: Uncommon Cost: {2} {1}

Incubation Triformer [Unknown Event] Cat Snake Set: From the Vault: TwentySet: Unknown Event Type: Creature Phyrexian Cleric Rarity: Common When Incubation Triformer enters the battlefield, incubate 1. 3: Choose target transformed Phyrexian token you control. Transform it into a third side that's a 3 3 Phyrexian Horror artifact creature.