Ultimate Super Saiyan is a transformation that is achieved after a Saiyan has gone through the ritual that the Grand Supreme Kai of Universe-K, the Elder Kai of Universe-B, and Kaestos know how to perform, which unleashes an individual's full potential over a few hours. Future Trunks' enhanced Super Saiyan 2 form is considered a variant of this transformation. It is called Strengthened Super Saiyan 2 by Future Trunks.