Urza, Prince of Kroog, Su-Chi Cave Guard, and Altar of Dementia

Prerequisites

• Urza, Prince of Kroog on the battlefield
• Su-Chi Cave Guard on the battlefield
• Altar of Dementia 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 Altar of Dementia by sacrificing the Su-Chi Cave Guard token
3. When the token Su-Chi Cave Guard dies, it triggers, adding eight
4. Resolve the Altar of Dementia ability
5. Repeat

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite creature copies of artifacts you control