Krark-Clan Ironworks + Metalwork Colossus + Mirrodin Besieged + Pitiless Plunderer

Mana needed: {1} (at most)

UB identity

Commander legal

The 4 combo pieces

What must be in place

You conrol noncreature artifacts with a total mana value of 10 or greater.
"Mirran" chosen with Mirrodin Besieged.

How to execute it

  1. Cast Metalwork Colossus by paying at most {1}.
  2. Mirrodin Besieged triggers, creating a 1/1 Myr artifact creature token.
  3. Activate Krark-Clan Ironworks by sacrificing Metalwork Colossus, adding {C}{C}.
  4. When Metalwork Colossus dies, Pitiless Plunderer triggers, creating a Treasure token.
  5. Activate Metalwork Colossus by sacrificing the Treasure and Myr, returning it from your graveyard to your hand.
  6. Repeat.

What the combo produces