Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Umbral Collar Zealot, and Virtuous Variant

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Umbral Collar Zealot on the battlefield
• Virtuous Variant on the battlefield

Steps

1. Activate Umbral Collar Zealot by sacrificing Virtuous Variant
2. When Virtuous Variant dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When Virtuous Variant enters, it triggers, putting a +1/+1 counter on it
4. Resolve the Umbral Collar Zealot ability
5. Repeat

Results

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