Solemnity, Luminous Broodmoth, and Reckless Barbarian

Prerequisites

• Solemnity on the battlefield
• Luminous Broodmoth on the battlefield
• Reckless Barbarian on the battlefield

Steps

1. Activate Reckless Barbarian by sacrificing it, adding
2. When Reckless Barbarian dies, Luminous Broodmoth triggers, returning Reckless Barbarian from your graveyard to the battlefield without a flying counter on it due to Solemnity
3. Repeat

Results

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