Mirran Spy, Banishing Knack, and Ornithopter

Prerequisites

• Mirran Spy on the battlefield
• Banishing Knack in hand
• Ornithopter on the battlefield
• available

Steps

1. Cast Banishing Knack by paying , targeting Mirran Spy
2. Activate Mirran Spy by tapping it, returning Ornithopter from the battlefield to your hand
3. Cast Ornithopter by paying
4. Mirran Spy triggers, untapping itself
5. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB
• Infinite storm count