“ A demon that feeds on good feelings, causing those around to feel upset or angry all the time.”
“ Golden coins that turn to lead within a few hours of being taken from their place of origin, causing a lot of trouble for whoever spends them.”
“ 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...”