Mirran Spy, and Banishing Knack

Prerequisites

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

Steps

1. Cast Banishing Knack by paying , targeting a creature you control
2. Cast the artifact by paying
3. Mirran Spy triggers, untapping the creature targeted by Banishing Knack
4. Activate the creature by tapping it, returning the artifact from the battlefield to your hand
5. Repeat from step 2

Results

• Infinite artifact ETB
• Infinite artifact LTB
• Infinite creature LTB
• Infinite creature ETB
• Infinite storm count