Leonardo, Sewer Samurai, Solemnity, Grinding Station, and Ornithopter

Prerequisites

• Leonardo, Sewer Samurai on the battlefield
• Solemnity on the battlefield
• Grinding Station on the battlefield
• Ornithopter on the battlefield

Steps

1. Activate Grinding Station by tapping it and sacrificing Ornithopter
2. Cast Ornithopter from your graveyard by paying
3. It will not enter with a finality counter on it due to Solemnity
4. When Ornithopter enters, Grinding Station triggers, untapping Grinding Station
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite mill
• Infinite self-mill
• Infinite storm count