First of all - English is not my native language (:
Now about the hero himself. Initially, I wanted to make a hero in the lore of the game, but due to the lack of suitable art for any warcraft blood mages, I made a fictional hero, but close to the lore of the game. They are not blood elves and have nothing to do with Kael'thas. These are users of real blood magic (google it if necessary).