Therianthropes

Therianthropes are humans cursed to transform into human/animal hybrids on the three nights of the full moon.  The curse is passed on not by a simple bite, but by killing and not consuming the victim.  Generally Therianthropes are aggressive/predator type animals.  Their is no cure and only silver or magic weapons can kill them.  Other weapons can harm them, but will not kill them.

[Probably more to go here later.]