Corridor Monitor + Metalworker + Urza, Prince of Kroog

WU identity

Commander legal

The 3 combo pieces

What must be in place

You have at least three artifact cards in hand.
Metalworker does not have summoning sickness.

How to execute it

  1. Activate Metalworker by tapping it and revealing at least three artifact cards from your hand, adding at least six {C}.
  2. Activate Urza by paying {6}, creating a token copy of Corridor Monitor that is a 1/1 Soldier in addition to its other types.
  3. When the Corridor Monitor token enters the battlefield, it triggers, untapping Metalworker.
  4. Repeat.
  5. If you have four or more artifact cards in hand, this combo nets infinite colorless mana, and you may target any other artifact(s) you control.

What the combo produces