Urza, Prince of Kroog + Metalworker + Retreat to Coralhelm + Razortide Bridge

Prerequisites

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

Steps

1. 1Activate Metalworker by tapping it and revealing at least three artifact cards from your hand, adding at least six .
2. 2Activate Urza by paying , creating a token copy of Razortide Bridge that is a 1/1 Soldier.
3. 3When the Razortide Bridge token enters the battlefield, Retreat to Coralhelm triggers, untapping Metalworker.
4. 4Repeat.
5. 5If you have four or more artifact cards in hand, this combo nets infinite colorless mana, and you may target any artifact you control to get infinite copies of them.

Effects

• Infinite colorless mana
• Infinite copies of artifacts you control
• Infinite creature copies of artifacts you control
• Infinite creature ETB
• Infinite creature tokens
• Infinite landfall triggers