The Witcher: Nightmare of the Wolf is an epic fantasy adventure set in the world of The Witcher. Follow Geralt of Rivia and his allies as they battle a mysterious and powerful force that threatens to consume the world. With the help of powerful allies, Geralt must face his greatest challenge
From Wikipedia
The Witcher: Nightmare of the Wolf is a 2021 adult animated dark fantasy film for Netflix, produced by Lauren Schmidt Hissrich, and starring Theo James, Lara Pulver, Graham McTavish, and Mary McDonnell. The film serves as a spin-off of the Netflix series The Witcher. It focuses on the origin story of Geralt's mentor and fellow witcher Vesemir. The film premiered on August 23, 2021.