Ultimecia, Time Sorceress // Ultimecia, Omnipotent, Moonmist, Isochron Scepter, and Thassa, Deep-Dwelling

Prerequisites

• Ultimecia, Time Sorceress // Ultimecia, Omnipotent on the battlefield
• Moonmist in exile
• Isochron Scepter on the battlefield
• Thassa, Deep-Dwelling on the battlefield
• each turn available

Steps

1. Activate Isochron Scepter by paying and tapping it, casting a copy of Moonmist without paying its mana cost
2. Resolve Moonmist, transforming Ultimecia, Time Sorceress into Ultimecia, Omnipotent
3. Ultimecia, Omnipotent triggers, causing you to take an extra turn after this one
4. At the beginning of your end step, Thassa triggers, blinking Ultimecia, Omnipotent and causing it to re-enter the battlefield as Ultimecia, Time Sorceress
5. Whenever Ultimecia, Time Sorceress enters the battlefield, it triggers, causing you to surveil 2
6. Repeat each turn

Results

• Infinite turns