I will give 5 star, but only because I love Witcher series and think that nafiction about it should be supported.
But, the mere mention of Netflix's animated prequel The Witcher: Nightmare of the Wolf Killed any desire to read your story, because "Nightmare of the Wolf" is pure and utter garbage that shit on common sense and lore of Witcher as a whole. The fact that it included in your story really kills desire to read it. I have no idea as to why any fan of Witcher would include this garbage in a fic.