He won't die on his own, of course... Ottar knows how to treat frostbite! Uh... what are these 20% cold resistance? It used to be 50%!
Well, nothing to be done... one night will decide everything. Either nothing will happen, or he'll get sick with or without nightmares, or he'll be attacked. The outcome will determine the results of the investigation.
Normal blood can't be found here, so we'll have to wait a day. Ottar is waiting for the evening and goes to sleep, hoping to wake up alive.
...or that his nightmares will be stronger than the villagers'...
Ottar needs time to fall asleep. The wind howls through the miserable hut, and its wails don't help him get a good night's sleep, even if the cloak and furs protect the Blooddrinker from the biting cold.
But finally, he falls asleep. Or does he? Because before him is She.

-- Ottar... -- the woman shamelessly sits on the stomach of the sleeping (or not?) Ottar. Her breath burns as she leans towards his face. -- I was wondering if you would find me.
e si ieu muoir, er mi grans deliuriers