Nether Traitor, Yahenni, Undying Partisan, Sek'Kuar, Deathkeeper, and Enduring Vitality

Prerequisites

• Nether Traitor on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Sek'Kuar, Deathkeeper on the battlefield
• Enduring Vitality on the battlefield

Steps

1. Activate Yahenni by sacrificing Nether Traitor Sek'Kuar triggers, creating a 3/1 Graveborn creature token creature with haste
2. Resolve the Yahenni ability, giving them indestructible until end of turn
3. Activate the Graveborn token using the ability granted by Enduring Vitality by tapping it, adding
4. Activate Yahenni by sacrificing the Graveborn token Nether Traitor triggers, causing you to pay to return it from your graveyard to the battlefield
5. Resolve the Yahenni ability, giving them indestructible until end of turn
6. Activate Nether Traitor using the ability granted by Enduring Vitality by tapping it, adding
7. Repeat

Results

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