Wererat

Wererats are humanoids cursed to transform into degenerative rat-man when the stars fall from the sky. The randomness of their transformation has driven many afflicted wererats insane and paranoid and makes them plot against the surface world from their dens and uncities. They also like to steal anything that they determined to have any value, which is mostly shiny stuff, resulting in accumulation of piles of shiny junk that may contains something of value.

Description
When they are in their normal form the cursed tends to be a thin, wiry individual of shorter than average height with man often growing thin, ragged moustaches. The curse has left their faces contorted and elongated into a spits ratlike state. Their mouths have turned into an overbite and their ears have grown in size. Their eyes constantly dart from place to place and a particular odour hangs around cursed individuals. All of these traits results in them being condemned to the settlements ghetto and forced to beg, if they don't run off to the uncity.

But once the stars begin to fall from the sky they transform into form of the wererat. They shrink a tiny bit and its head, torso and tail become those of a rat while its limbs stay more akin to those of a humanoid in appearance. Wererats are cannibals, eating uninfected humanoids and subsisting on what they can scavenge or steal.

Culture
Wererats have an collective love-hate relationship with the dreaded "Backflip" and will mercilessly slay anyone seen doing one. This hatred comes from the story of knight Massawass and the wererat, where a knight constantly tries to do a backflip while his page fights a wererat. This anoyed the wererat so much that they eventually do a single backflip of their own and pierces the hearts of both the page and the knight.

Wererats like to congregate in massive numbers beneath cities were they build their own underground settlements called uncities, these cities are crude copies of the city above and get the same name as the city above it with the prefix Un- added in front of it (for example Ungreta is the wererat settlement under Greta). From these uncities they constantly make insane plans against the surface world that surely wants to slay them for their therianthropy.