Urza, Prince of Kroog
Corridor Monitor
Metalworker

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
You have at least three artifact cards in hand. Metalworker does not have summoning sickness.

   Steps

How does this combo work?
1
Activate Metalworker by tapping it and revealing at least three artifact cards from your hand, adding at least six .
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.

   Results

What do I get from this combo?
Infinite colorless mana
Infinite creature copies of artifacts you control
Infinite creature tokens
Infinite ETB
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