Tenacious Dead, Pitiless Plunderer, Yahenni, Undying Partisan, and Skittering Precursor

Prerequisites

• Tenacious Dead on the battlefield
• Pitiless Plunderer on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Skittering Precursor on the battlefield

Steps

1. Activate Yahenni by sacrificing Tenacious Dead
2. When Tenacious Dead dies, it, Skittering Precursor, and Pitiless Plunderer trigger
3. Resolve the Pitiless Plunderer trigger, creating a Treasure token
4. Resolve the Skittering Precursor trigger, creating a creature token
5. In response to the remaining trigger, activate Yahenni by sacrificing the creature token
6. When the creature token dies, Pitiless Plunderer triggers, creating a Treasure token
7. Resolve the Yahenni ability from step 5
8. Activate two Treasure tokens by tapping and sacrificing them, adding
9. Resolve the Tenacious Dead trigger, paying to return it to the battlefield from your graveyard
10. Resolve the Yahenni ability from step 1
11. Repeat

Results

• Infinite artifact LTB
• Infinite colored mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers