Armix, Filigree Thrasher (BRC 103)

Legendary Artifact Creature — Golem • Mana cost: {2}{B} • The Brothers' War Commander • Uncommon

Whenever Armix attacks, you may discard a card. When you do, target creature defending player controls gets -X/-X until end of turn, where X is the number of artifacts you control plus the number of artifact cards in your graveyard.
Partner (You can have two commanders if both have partner.)

Illustrated by Daniel Ljunggren.