Claw marks on the houses in the Village of Barovia.
The corpse where we found the Real Letter from Kolyan Indirovich also had claw marks.
In a Crypt in Vallaki we find writing that looks like the claw marks. We gave a copy of the writing to The Abbot to decipher.
Alaric knows the Comprehend Languages spell. Maybe he can decipher the text.
The Abbot deciphered it for us:
Quote
TODO: put in translation