Urza, Prince of Kroog, Su-Chi Cave Guard, and Phantom Train

Prerequisites

• Urza, Prince of Kroog on the battlefield
• Su-Chi Cave Guard on the battlefield
• Phantom Train on the battlefield
• available

Steps

1. Activate Urza by paying , creating a token copy of Su-Chi Cave Guard that is a 1/1 Soldier in addition to its other types
2. Activate Phantom Train by sacrificing the Su-Chi Cave Guard token
3. When the token Su-Chi Cave Guard dies, it triggers, adding eight
4. Resolve the Phantom Train ability
5. Repeat

Results

• Infinite death triggers
• Infinite sacrifice triggers
• Infinite +1/+1 counters on a creature
• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite creature copies of artifacts you control
• Infinite creature tokens