Wall screamer

It is very deadly, but is not trying to be harmful, it eats moss and bacteria off of limestone cave walls and if it see's you will scream very loud and at a high pitched frequency causing it to rupture eardrums and make caves collapse. It has a thick skin consisting of a hardened gel from its original planet Nuilnamias, called burtklop, making it hard to kill.It also has a hard plate on its back resembling concrete.This substance is unknown. If your methods of killing it do succeed, melting its skin can turn it back to burtklop, and then you can use the burtklop to make armor and clothing once it hardens again.