Necromancer's Covenant [Commander 2015] BRI021 Sacrifice another artifact or creature:

Sacrifice another artifact or creature: Put a +1/+1 counter on Dreadmobile

Set: Innistrad: Crimson Vow Commander Type: Enchantment — Rarity: Rare Cost: {1}{W} Whenever a creature an opponent controls dies

Set: Rhinar Hero Deck Finish: Regular Type: Action Rarity: Rare Class: Brute Cost: 0 Your next Brute attack this turn gains "If this attack is defended by less than 2 non-equipment cards

Mayhem Devil deals 1 damage to any target

the wurm engine kept operating long after its creators were gone

Necromancer's Covenant [Commander 2015] BRI021 Sacrifice another artifact or creature:Set: Commander 2015 Type: Enchantment Rarity: Rare Cost: {3}{W}{B}{B} When Necromancer's Covenant enters the battlefield, exile all creature cards from target player's graveyard, then create a 2 2 black Zombie creature token for each card exiled this way. Zombies you control have lifelink.