Nether Traitor, Bartolomé del Presidio, Sek'Kuar, Deathkeeper, and Elven Chorus

Prerequisites

• Nether Traitor on the battlefield
• Bartolomé del Presidio on the battlefield
• Sek'Kuar, Deathkeeper on the battlefield
• Elven Chorus on the battlefield

Steps

1. Activate Bartolomé del Presidio by sacrificing Nether Traitor Sek'Kuar triggers, creating a 3/1 Graveborn creature token creature with haste
2. Resolve the Bartolomé del Presidio ability, putting a +1/+1 counter on them
3. Activate the Graveborn token using the ability granted by Elven Chorus by tapping it, adding
4. Activate Bartolomé del Presidio by sacrificing the Graveborn token Nether Traitor triggers, causing you to pay to return it from your graveyard to the battlefield
5. Resolve the Bartolomé del Presidio ability, putting a +1/+1 counter on them
6. Activate Nether Traitor using the ability granted by Elven Chorus by tapping it, adding
7. Repeat

Results

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