Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Vizier of Remedies, and Blood Pet

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Vizier of Remedies on the battlefield
• Blood Pet on the battlefield

Steps

1. Activate Blood Pet by sacrificing it
2. When Blood Pet dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Vizier of Remedies
3. Resolve the Blood Pet ability
4. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite black mana
• Infinite death triggers
• Infinite sacrifice triggers