Yahenni, Undying Partisan, Nether Traitor, Pawn of Ulamog, and Pitiless Plunderer

Prerequisites

• Yahenni, Undying Partisan on the battlefield
• Nether Traitor on the battlefield
• Pawn of Ulamog on the battlefield
• Pitiless Plunderer on the battlefield

Steps

1. Activate Yahenni by sacrificing Nether Traitor
2. When Nether Traitor dies, Pitiless Plunderer and Pawn of Ulamog trigger
3. Resolve the Pitiless Plunderer trigger, creating a Treasure artifact token
4. Resolve the Pawn of Ulamog trigger, creating a 0/1 Eldrazi Spawn token
5. Resolve the Yahenni ability, giving it indestructible until end of turn
6. Activate the Eldrazi Spawn token by sacrificing it, adding
7. When the Eldrazi Spawn dies, Pitiless Plunderer and Nether Traitor trigger
8. Resolve the Pitiless Plunderer trigger, creating another Treasure token
9. Activate a Treasure token by tapping and sacrificing it, adding
10. Resolve the Nether Traitor trigger, causing you to pay to return it from your graveyard to the battlefield
11. Repeat

Results

• Infinite colored mana
• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite Treasure tokens