A sorcerer with evil intentions or just a murderer waiting for another fool?
At a crossroads, the characters come across a trio of thick poles set into the ground, just outside the overlapping roads.
Temple of some malign being invites you warmly and offers help (curing,needed spell etc) for some minor sacrifice . Sacrifices must be everytime bigger to work - up to living inteligent creatures. Maybe you pay some other price,too...