Warriors Book 1 The First Shots Of War
Frostbite__
A group of primal warriors are granted the most powerful weapons in the universe and immortality. But at a cost. They must be the protectors of the entirety of humanity. Oh. And battle the gods themselves. Minute detail.
Also, disclaimer. I know they had special languages and things like that in the primal era, but you wouldn't be able to read a book where the conversations are like,
"Tac alaquista."
"Cha afquantana."
*grunts*
Because just, no.