Ultimate Super Saiyan (LOTSG)

"Oh, we can still go Super Saiyan, and trust me when I say that it will be unlike anything you have ever felt before. When entering Super Saiyan as we are now, our potential becomes truly unleashed."

- Kaestos to Gohan Ultimate Super Saiyan is a form attained after a Saiyan has their full potential unleashed by the Elder Kai's Ritual and then manages to enter Super Saiyan.

Appearance
This form looks identical to the user's Super Saiyan 2 state, but without the lightning appearing in the aura surrounding their body.

Usage and Power
While in this form the user gains a boost of power equivalent to Super Saiyan 3, increasing their power by a factor of 400. The form also holds little strain unless they haven't trained at all in years.

Kaestos first used some of this forms power during his fight against Mira, and defeated the powered up demon (who had a Ki equal to Super Saiyan Vegeto) in one hit.

When Demigra later appeared Kaestos fully entered this form and fought the Demon God, but found it wasn't enough.

After over 5 Million years Kaestos once more used this form, this time in his fight against Super Buu (Gohan, Piccolo, and Ultimate Gohan absorbed) after Vegeto allowed himself to be absorbed, and despite Buu becoming more powerful Kaestos managed to push the villain just as hard as the fusion could.

Kaestos later admitted that his Ultimate Super Saiyan form simply pushed him back to what his base power once was, and that at full strength this form should be 400 times stronger than Super Vegeto.

Gohan also learned how to use this form with Kaestos guidance, and initially had about half the strength of Super Vegeto, but after 2 years of training he was equal to the powerful fusion.

Drawbacks
If a Saiyan isn't used to this form before or has been lax about training it can rapidly drain them of their Ki and leave them in a dazed state until they get used to the form or have gained enough of power.

Kaestos first experienced this during when he fought against Super Buu (Gohan, Piccolo, Trunks, and Goten absorbed) as he hadn't used this form for years, but he managed to hold onto the form long enough for Goku and Vegeta to free Super Buu's victims.

Gohan later experienced this when he first transformed while training with Kaestos, and had to use the form a few times before overcoming the initial stress.