Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Luminous Broodmoth, and Umbral Collar Zealot

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Luminous Broodmoth on the battlefield
• Umbral Collar Zealot on the battlefield

Steps

1. Activate Umbral Collar Zealot by sacrificing another nontoken creature that doesn't have flying
2. When the creature dies, Luminous Broodmoth triggers, returning the creature from your graveyard to the battlefield with a flying counter on it
3. Activate Umbral Collar Zealot by sacrificing the creature with a flying counter on it
4. When the creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
5. Resolve the Umbral Collar Zealot abilities from step 1 and 3
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite surveil 1