Myr Battlesphere [Commander 2018] Troll Skeleton or aura of the Necrite

or aura of the Necrite that killed so effectively

Set: Innistrad Type: Creature — Dog Rarity: Common Cost: {4}{W} "I've learned to trust my dogs' instincts

Set: Rivals of Ixalan Type: Artifact — Equipment Rarity: Common Cost: {3} Equipped creature gets +1/+1 and has haste

Set: Shadows over Innistrad Type: Sorcery Rarity: Rare Cost: {4}{R}{R} Create four 1/1 red Devil creature tokens

Myr Battlesphere [Commander 2018] Troll Skeleton or aura of the NecriteSet: Commander 2018 Type: Artifact Creature Myr Construct Rarity: Rare Cost: {7} When Myr Battlesphere enters the battlefield, create four 1 1 colorless Myr artifact creature tokens. Whenever Myr Battlesphere attacks, you may tap X untapped Myr you control. If you do, Myr Battlesphere gets +X +0 until end of turn and deals X damage to the player or planeswalker it's attacking.