Sardian Avenger
From The Brothers' War Commander set
Sardian Avenger
Creature — Goblin Warrior
1/1
First strike, trample
Whenever this creature attacks, it gets +X/+0 until end of turn, where X is the number of artifacts your opponents control.
Whenever an artifact an opponent controls is put into a graveyard from the battlefield, this creature deals 1 damage to that player.