Mirran Spy, Banishing Knack, and Mox Opal

Prerequisites

• Mirran Spy on the battlefield
• Banishing Knack in hand
• Mox Opal on the battlefield
• You control at least three artifacts

Steps

1. Activate Mox Opal by tapping it, adding
2. Cast Banishing Knack by paying , targeting Mirran Spy
3. Activate Mirran Spy by tapping it, returning Mox Opal from the battlefield to your hand
4. Cast Mox Opal by paying
5. Mirran Spy triggers, untapping itself
6. Activate Mox Opal by tapping it, adding one mana of any color
7. Repeat from step 3

Results

• Infinite colored mana
• Infinite ETB
• Infinite LTB
• Infinite storm count