Slime

They are a large mass of gel. They have no limbs, bones, muscles, organs, not even a brain can be seen, because you see right through them. The only way to identify them is color.

They're a failed attempt to make Ur'

Slime's can grow to abnormal size, rivaling the largest of monsters. They seem to gain size as they "eat" more.

They will side over bodies, digesting them, slowly very slowly. Well fed ones will grow to extreme sizes.

They follow Ur' , and are commanded to attack human. They don't seem to be able to think.

Despite many studies, its unknown how they see, or hear anything. Its not even clear how they use magic that rivals that of humans.

They have been around as long as Ur' have been around. They are used to attack human settlements as they're one of the few ways Ur' can breach the walls.