Koll, the Forgemaster, Sai of the Shinobi, Ornithopter, and Ashnod's Altar

Prerequisites

• Koll, the Forgemaster on the battlefield
• Sai of the Shinobi on the battlefield
• Ornithopter in hand
• Ashnod's Altar on the battlefield

Steps

1. Cast Ornithopter by paying
2. Ornithopter enters the battlefield, triggering Sai of the Shinobi, attaching Sai of the Shinobi to Ornithopter
3. Activate Ashnod's Altar by sacrificing Ornithopter, adding
4. Ornithopter dies, triggering Koll, returning Ornithopter from your graveyard to your hand
5. Repeat

Results

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