Tenacious Dead, Pitiless Plunderer, Bloodflow Connoisseur, and Pawn of Ulamog

Prerequisites

• Tenacious Dead on the battlefield
• Pitiless Plunderer on the battlefield
• Bloodflow Connoisseur on the battlefield
• Pawn of Ulamog on the battlefield

Steps

1. Activate Bloodflow Connoisseur by sacrificing Tenacious Dead
2. When Tenacious Dead dies, it, Pawn of Ulamog, and Pitiless Plunderer trigger
3. Resolve the Pitiless Plunderer trigger, creating a Treasure token
4. Resolve the Pawn of Ulamog trigger, creating a creature token
5. In response to the remaining trigger, activate Bloodflow Connoisseur by sacrificing the creature token
6. When the creature token dies, Pitiless Plunderer triggers, creating a Treasure token
7. Resolve the Bloodflow Connoisseur 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 Bloodflow Connoisseur ability from step 1
11. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite artifact LTB
• Infinite colored mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers