Massacre Wurm [March of the Machine Commander] Servo for as long as that

for as long as that card remains on top of your library

Set: EX: Crystal Guardians Type: Darkness Rarity: Ultra Rare Retreat cost: 0

created by an unknown hand to enforce justice

Set: Commander 2011 Type: Enchantment Rarity: Uncommon Cost: {2}{R}{R} At the beginning of the end step

if it's on the battlefield

Massacre Wurm [March of the Machine Commander] Servo for as long as thatSet: March of the Machine Commander Type: Creature Phyrexian Wurm Rarity: Mythic Cost: {3}{B}{B}{B} When Massacre Wurm enters the battlefield, creatures your opponents control get 2 2 until end of turn. Whenever a creature an opponent controls dies, that player loses 2 life.