Harry Du Bois’s review published on Letterboxd:
Don’t expect anything utterly standout (actually, if you’re purely looking for a riveting story that veers on torture porn, this may satiate your needs), but Nightmare of the Wolf is a competently-made thrill ride in the Witcher world. As far as I know, you don’t need to have a lot of foreknowledge to enjoy the film — the concepts more or less explain themselves and the story’s self-contained. Just be mindful that this goes all in on gore, and you’ll be set for a worthwhile movie.
Watching this garnered a lot of respect for Vesemir from me. All the sh*t he goes through in this movie, and we mostly see him as a more-or-less kindly old man when Geralt is the main character. This film is brutal in its breakdown of Vesemir, and I wasn’t expecting the adrenaline rush I got from the final twenty minutes. For what is ostensibly a cash-in movie for a popular Netflix show that’s also tied to a popular series of video games, pretty well done!