Plot hook: the PCs are hired by a wizard to capture and deliver an ever-weirder list of wildlife and magical constructs. Over time, they learn what he’s using all of these critters for. They’re parts sources. The wizard is a fleshcrafter, taking contracts from other wizards or eccentric wealthy nobles to create the hybrid pets and guardians of their dreams.

He calls his business Build-an-Owlbear.

(Alternate title for extra horror if the PCs are being asked to abduct goblinoids: Build-a-Bugbear.)