Ultimecia, Time Sorceress // Ultimecia, Omnipotent + Moonmist + Isochron Scepter + Airbender Ascension

Ultimecia, Time Sorceress // Ultimecia, Omnipotent

Moonmist

Isochron Scepter

Airbender Ascension

How it works

1. Activate Isochron Scepter by paying 2 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, Airbender Ascension 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.

By looping Moonmist with Isochron Scepter, you can repeatedly transform Ultimecia, Time Sorceress into her Omnipotent back face to trigger Time Compression for an endless succession of extra turns. Airbender Ascension plays a vital role here by utilizing its end-step trigger to blink Ultimecia, Omnipotent back into Ultimecia, Time Sorceress, resetting her so she can be transformed all over again.