How can you create a combo with Urza, Prince of Kroog, Corridor Monitor, Metalworker?
user
[START OF COMBO]This combo can be formed with Urza, Prince of Kroog, Corridor Monitor, Metalworker

Color identity: WU
Mana cost: 
Steps:
  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.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite creature copies of artifacts you control
  - Infinite creature tokens
  - Infinite enters the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have at least three artifact cards in hand.
  - Metalworker does not have summoning sickness.
[END OF COMBO PREREQUISITES]
assistant