Action-packed trailer for 'The Witcher: Nightmare of the Wolf' introduces Geralt's mentor Vesemir

Before there was Geralt of Rivia, there was Vesemir.

Netflix's upcoming anime film The Witcher: Nightmare of the Wolf is a prequel to The Witcher that tells the origin story of Geralt's mentor, Vesemir (voiced by Theo James). The trailer gives us a glimpse into the painful process by which Vesemir becomes a Witcher, as well as...