Monstrosities: Werebat Shrieker (Patreon)

Werebat Shriekers are feral beasts that have spent up to a century roaming the caves of the underdark with their curse. Shriekers are unable to change back to their humanoid form, cursed to stay in their hybrid form – a long armed, muscled humanoid body with a hideous bat head with an extra pair of mandibles. A shrieker is able to use its vocal cords to create hypersonic sounds that incapacitate its prey for an easy kill. Most werebats live in familial clans and shriekers tend to be the oldest in these groups. No longer able to communicate they become highly aggressive guardians for their clan. When a werebat becomes a shrieker they enter into random rabid states until they become too dangerous to keep among the clan and are exiled to the fringes. Shriekers in the outskirts of their clans territory among colonies of bats and giant bats. Not all werebats tend to turn into shriekers after a century with their affliction but at least 70% of them due. On like most lycanthropes shriekers turn back to their humanoid form and are granted their intelligence back on full moons. Many return back to the clan to see their family.

Art by Jose Pericles on Artstation