Melira, Sylvok Outcast, Wingrattle Scarecrow, and Ashnod's Altar

Prerequisites

• Melira, Sylvok Outcast on the battlefield
• Wingrattle Scarecrow on the battlefield
• Ashnod's Altar on the battlefield
• You control a black creature

Steps

1. Activate Ashnod's Altar by sacrificing Wingrattle Scarecrow, adding
2. Wingrattle Scarecrow dies, triggering its persist ability, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Melira
3. Repeat

Results

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