The Vile Slime

Natural pray to the Vile Titan, the slime species has suffered for many many centuries to the limbs of its predator. Where no light could be seen, where no sound from the surface reached, poor critter creatures lost the path to their homes and were left there to starve, but fortunately for the slime species, that was the perfect environment for evolution, they can't see, they can't talk, they can't eat and they can't hear, but they absorb, and the bones of those poor critters were absorbed to form a bone structure around the slime as a form of protection from the hungry titans.
After centuries hidden within the depths of the geode caves, when they were thought to be extinct, the slime species resurfaces, but so different from what was seen before, that it was given a new name by Geodians and Trovians alike: the Vile Slimes.