Vesperlark, Glasspool Mimic // Glasspool Shore, and Ashnod's Altar

Prerequisites

• Vesperlark on the battlefield
• Glasspool Mimic // Glasspool Shore on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Glasspool Mimic, adding
2. When Glasspool Mimic dies, it triggers, returning itself from your graveyard to the battlefield as a copy of Vesperlark
3. Repeat

Results

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