Instead of werewolves people turning in giant hands that crush people into goo
A baker announces he never leaves out the customary loaves for the good-folk in a tavern, and is warned by crotchety old woman about the cuuurse-> a hand climbs down his throat in the night, send by woman->the following nights a human sized hand climbs out of his mouth taking all his mass and leaving a bag of skin>on the first night they murder a dog->the second night a child -> the 3rd night a man -> the 4th night a horse -> the 5th night they trigger an avalanche killing a pilgrimage-> then the baker finally confesses and is executed and the killings stop .
Actually the Women wanted to kill the pilgrimage all along , as she is in process of usurping the pilgrimage site to the old ways, but wanted to deflect attention.
If the baker is stopped or found early , she will find someone else that is has plausible pissed off old powers and send a hand after them to put the curse on them. She has only 3 hands (2 after the baker)
If the pilgrimage makes it the site she will murder them there, and try and plant the blame on outsiders .
Giant hand photo from here