Syr Konrad, the Grim, Nether Traitor, Pawn of Ulamog, and Phyrexian Altar

Prerequisites

• Syr Konrad, the Grim on the battlefield
• Nether Traitor on the battlefield
• Pawn of Ulamog on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Nether Traitor, adding
2. Syr Konrad and Pawn of Ulamog trigger
3. Resolve the Syr Konrad trigger, dealing 1 damage to each opponent
4. Resolve the Pawn of Ulamog trigger, creating a 0/1 Eldrazi Spawn creature token
5. Activate the Eldrazi Spawn token by sacrificing it, adding
6. Syr Konrad and Nether Traitor trigger
7. Resolve the Syr Konrad trigger, dealing 1 damage to each opponent
8. Resolve the Nether Traitor trigger, causing you to pay to return it from your graveyard to the battlefield
9. Syr Konrad triggers, dealing 1 damage to each opponent
10. Repeat

Results

• Infinite colored mana
• Infinite colorless mana
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers