Melira's Keepers, Luminous Broodmoth, and Ashnod's Altar

Prerequisites

• Melira's Keepers on the battlefield
• Luminous Broodmoth on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Melira's Keepers, adding
2. Melira's Keepers dies, triggering Luminous Broodmoth, returning Melira's Keepers from your graveyard to the battlefield without a flying counter on it
3. Repeat

Results

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