Introduction: In the last and futuristic city of humanity, Neo Tyran, the legendary Hunters of Olympus, extraordinary warriors sponsored by the gods, dominate the streets. Divided into factions, these hunters fiercely compete to recruit the most promising human talents. Martyn Tryggvason, nicknamed "the impure," has lived a life of contempt and loneliness, ignored by all the gods and relegated to the shadows.But when Martyn awakens in the mystical Valhalla, everything changes. A resonant message in his mind says: [Welcome to Valhalla: the Norse gods have chosen you] In this new world, Martyn discovers a realm of ancient gods, impossible challenges, and the opportunity to change his life....