Gogo, Master of Mimicry, and Magosi, the Waterveil

Prerequisites

• Gogo, Master of Mimicry on the battlefield
• Magosi, the Waterveil on the battlefield
• each turn at most available

Steps

1. Activate Magosi's third ability by tapping it, removing an eon counter from it and returning it from the battlefield to your hand
2. Holding priority, activate Gogo by paying and tapping it, copying Magosi's ability twice
3. Resolve all Magosi abilities, causing you to take three extra turns after this one
4. Play Magosi from your hand
5. Move to your first extra turn
6. Activate Magosi's second ability by paying and tapping it, putting an eon counter on it and causing you to skip your next turn
7. Move to your third extra turn, as your second extra turn will be skipped due to Magosi's ability
8. Repeat

Results

• Infinite turns