The Starforge

Whenever an artifact enters the battlefield, you may pay {p/b}{p/b}{p/b}. If you do, create a copy of that artifact. You may only do this once per turn.

Whenever a nontoken permanent leaves the battlefield under your control, you lose 2 life unless you sacrifice a token.

{p/b}{p/b}{p/b}: Target player gains control of The Starforge. You lose 6 life.