Boneyard Wurm [Wizards Play Network 2011] Jackal Warrior Set: Commander 2015 Type: Enchantment

Set: Commander 2015 Type: Enchantment Rarity: Uncommon Cost: {3}{B} When Diabolic Servitude enters the battlefield

Paradoxically

Set: Battle for Zendikar Type: Land Rarity: Rare Shambling Vent enters the battlefield tapped

At the beginning of the upkeep of enchanted enchantment's controller

Boneyard Wurm [Wizards Play Network 2011] Jackal Warrior Set: Commander 2015 Type: EnchantmentSet: Wizards Play Network 2011 Type: Creature Wurm Rarity: Rare Cost: {1}{G} Boneyard Wurm's power and toughness are each equal to the number of creature cards in your graveyard. The only thing it likes more than discovering a pit of bones is adding to it.