Cursed Seal of Hell (HBH)

The Cursed Seal of Hell is a powerful powerful juinjutsu created by Garia, who branded himself with the cursed seal to enhance his abilities.

Usage
Like all cursed seals, the user receives increased chakra levels and physical capabilities when the seal is active, to the point where with the second level, Garia was capable of completely overwhelming before he was able to activate his Mangekyō Sharingan and unleash his Susanoo. When faced off against Madara's Susanoo, Garia struggled slightly, but was still able to fight equally against Madara.

Limit Breaker
Garia accessed a new, and unique, stage of his cursed seal when he mixed the cursed seal's chakra with the chakra of the that resided inside his body, and as a result, unlocked a new and powerful transformation. Just by the form's appearance, it was enough to momentarily paralyze Madara with shock.

Under this stage, Garia's powers increased to the point that Madara claims that it's beyond recognition, but quickly states that it also brought critical drawbacks just by quickly studying the form. By Madara's observation, the form causes intense strain on the body, and if used for too long, could potentially cause Garia to die from the pressure. Another side-effect was that Garia could lose control of his own mind due to the overwhelming power, similar to how the of the  could lose itself because of the beast's overwhelming power.

During their fight, Madara claims that Garia had completely surpassed the expectations of a and deemed him as the "one who broke his own limits", and suggested naming Garia's form as Limit Breaker, and despite Garia never truly acknowledging the name, it was subsequently named in the history books.

According to Garia himself, the seal itself contains Orochimaru's chakra, his consciousness remained split amongst the cursed seal, and should his original body be destroyed by any means, he could ultimately, although not guaranteed, be restored to his original state and mind, although Garia never truly tested this theory since he was never beaten in that form.