Two male protagonists + mutual attack + quick travel + narcissus + inhuman form + 1v1 + sweet pet without cruelty
Tepeuan picked up a small emerald green snake in an abandoned temple.
The little snake glanced at him with wet golden eyes, then nuzzled his fingers.
From then on, it stayed on his wrist and never left it again.
Later he learned that the snake was Quetzalcoatl, which the Empire had been hunting for hundreds of years.
And he is the youngest chief priest of the empire.