Whenever Tetzin or another double-faced artifact enters the battlefield under your control, mill three cards. You may put an artifact card from among them into your hand.
Craft with six artifacts 4
Reverse Type:
Legendary Artifact Creature — Gnome
Vigilance, trample
Whenever the Golden-Gear Colossus enters the battlefield or attacks, transform up to one other target double-faced artifact you control. Create two 1/1 colorless Gnome artifact creature tokens.