Gonti's Aether Heart, Displacer Kitten, and Karn, the Great Creator

Prerequisites

• Gonti's Aether Heart on the battlefield
• Displacer Kitten on the battlefield
• Karn, the Great Creator on the battlefield
• undefined each turn available

Steps

1. Activate Gonti's Aether Heart by paying eight and exiling it, causing you to take an extra turn after this one
2. Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Gonti's Aether Heart from exile to your hand
3. Cast Gonti's Aether Heart by paying
4. Displacer Kitten triggers, blinking Karn
5. Repeat each turn

Results

• Infinite turns