Alright so Lore for why den is yharmins enemy coming up:
Yharmin had lost lots of soilders on his conquest, and his army was shrinking by the hour, he needed a force that wouldn’t be so easily dispensable, but not one stronger than himself, he needed a student, a student who would follow in his footsteps, along with him, but not be the leader, and so of course, he found den, he saw potential in den, and den had no known relatives, he was a lost soul, beaming with purpose, and that purpose was war, so he eventually gave den the power of heat, he had made his axe a conducted of not just fire, but lightning too, dens hands beamed with fire, his fisted engulfed with flames, but yet, den wasn’t hurt. Now was the real test, to see if den was worthy of his army, he saw den obliterate the British, taking them out like a kid stepping on ants. He deemed himself worthy, all that was left was the confrontation, but he needed the perfect timing, he was waiting for dens guard to be down, so he would get injured by him, so when den moved to Britain. Yharmin arrived, he requested a spot in his army. And since den had nothing else going on, he gracefully accepted the offer