Krark-Clan Ironworks + Metalwork Colossus + Slagstone Refinery + Sly Requisitioner

B identity

Commander legal

The 4 combo pieces

What must be in place

Noncreature artifacts you control have a combined mana value of ten or greater.

How to execute it

  1. Activate Krark-Clan Ironworks by sacrificing Metalwork Colossus, adding {C}{C}.
  2. When Metlwork Colossus dies, Sly Requisitioner and Slagstone Refinery trigger.
  3. Resolve the Sly Requisitioner trigger, creating a 1/1 Servo artifact creature token.
  4. Resolve the Slagstone Refinery trigger, creating a tapped Powerstone artifact token.
  5. Activate Metalwork Colossus by sacrificing the Servo and the Powerstone token, returning Metalwork Colossus from your graveyard to your hand.
  6. Cast Metalwork Colossus by paying at most {1}.
  7. Repeat.

What the combo produces