Mikaeus, the Unhallowed, Luminous Broodmoth, and Blood Vassal

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Luminous Broodmoth on the battlefield
• Blood Vassal on the battlefield

Steps

1. Activate Blood Vassal by sacrificing it
2. When Blood Vassal dies, Mikaeus triggers, returning Blood Vassal from your graveyard to the battlefield with a +1/+1 counter on it
3. Activate Blood Vassal by sacrificing it
4. When Blood Vassal dies, Luminous Broodmoth triggers, returning Blood Vassal from your graveyard to the battlefield with a flying counter on it
5. Repeat

Results

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