Although the Azothrall immediately started to suffer from third-degree burns, its regeneration ability and its body's swift adaptation to the current environment allowed the monster to survive its current predicament.
However, it would still take some time before it fully adapted to the river of magma around it.
Time that Zion wouldn't waste, not even a second.
Rocky's jaws clamped on the body of the Alien-like Monster and dragged it down into the river of Magma, where it was hottest.
Azothrall fought back until Rocky's face was destroyed.
Regaining its freedom, it hastily tried to resurface, but it was once again bit down by the newly formed head of the Magma Bal-Boa.
This was the main reason why Thirteen and Rocky decided to bring the battle deep underground where the river of Magma was located. As long as there was Magma, Rocky was invincible.