Vulcan's Workshop

{3}: Untap Vulcan's Workshop.

{2}, {t}: Create a 1/1 colorless Golem artifact creature token.

{1}, {t}, Sacrifice a Golem: Create a 1/1 colorless Thopter artifact creature token with flying.

{t}, Sacrifice a Thopter: Create a 4/4 colorless Construct artifact creature token.