Uroktor are the juvenile form of the Leviathan, Agnaktor. Just like their adult form, they have the remarkable ability to tunnel through solid volcanic rock. Uroktor are distinguished by their reddish-purple skin, which protects them from both the sweltering heat and volcanic predators. Uroktor are very similar to the water-dwelling Ludroth, aside from the obvious difference in habitat, and the frequent burrowing (which the Ludroth only does when hit by a Dung Bomb or torch). Like their adult form and certain monsters that burrow, they can be unearthed by a Sonic Bomb.
They attack in two main ways: they can tunnel underground then pop back up, or they can attack by spitting lava. Their lava spit attack is a small version of the laser Agnaktor uses.