Ultimate Super Saiyan (LOTSG)

".... We can still go Super Saiyan, and trust me when I say that when you master its power it will be unlike anything you have ever felt in your life."

- Kaestos to Gohan Ultimate Super Saiyan is a transformation that is achieved after a Saiyan has gone through the ritual that the Elder Kai and Kaestos know how to perform which unleashes one's full potential.

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

Usage and Power
When 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 on one's body unless they haven't trained seriously or used it for years.

Kaestos first used some of this form's power during his fight against Mira, and defeated the powered up demon (who held power equal to Super Saiyan Vegeto) in one hit.

When Demigra later appeared Kaestos fully entered this form and briefly fought with the Demon God, seeming to fight him evenly; however Kaestos quickly discovered that Demigra was holding back and toying with him.

After over 5 Million years Kaestos once more used this form, this time in his fight against Super Buu (Gotenks, Piccolo, and Ultimate Gohan absorbed) after Vegeto allowed himself to be absorbed, however Super Buu did gain the power of Super Saiyan 2 Goku and Vegeta.

During their fight Kaestos retained relative control of it until Super Buu was defeated from the inside out by Goku and Vegeta.

After the fight against Buu concluded Gohan learned how to use this form with Kaestos' guidance, and by the time of the revived Freeza's invasion he was equal to 10% of the tyrant's mastered Final Form.

Kaestos later admitted that his Ultimate Super Saiyan form was far weaker than what it once was, and even during Freeza's second attempt to get revenge against Goku he only had 30% of the tyrant's Mastered Final Form power, he later implied that at full power he would have 120% Freeza's Final Form power, equivalent to God Ki 1.5

Drawbacks
If a Saiyan hasn't used this form before or has been lax about training for a great deal of time it can rapidly drain their Ki reserves and only have half its intended effectiveness.

Kaestos first experienced this after 5 Million years of slacking off in his training when fighting Super Buu (Gohan, Piccolo, Gotenks absorbed w/Super Saiyan 2 Goku and Vegeta's power), only experiencing a 200x multiplier for the majority of their fight.

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.