Ammut

An ammut is a spirit that serves the animalistic goddess Tarasque within her lair of fire and steam. Like their mistress, these demons possess next to no intellect and their only purpose is to devour the fragments of tainted soul that the goddess fails to consume. However, occasionally ammuts are summoned to the surface world wither by evokers or sources of mass destruction such as great battlefields or natural disasters that cause massive casualties. Outside of their native pit deep underground, these spirits exist only to mindlessly create carnage and provoke existential terror. They act almost as extensions of their goddess's aspect and have almost no free will of their own.
An ammut is over 20 feet long and stands over 10 feet tall at the shoulder. It resembles a titanic hippopotamus with feet that possess the claws of a lion and the agility of an animal much smaller and leaner than its visage. A shaggy mane surrounds a terrible head sporting the jaws of a crocodile or giant shark. Serrated teeth line its maw and two small eyes burn like smouldering coals.