Since we've always had frost trolls and frost giants, why not fire trolls and fire giants? They could be a type of daedra, or something. Sheogorath, Molag Bal, Mehrunes Dagon, Boethiah, etc. would all make sense to have them. Every attack could have fire damage, they could be extremely fire repelent, fire giants can make an explosion when they hit down with their club, fire trolls can have fire cloaks, or... breath fire if you're feeling adventurous...
Fire Giants could herd lesser daedra in their plane of oblivion, instead of mammoths; they could be like slavers (molag bal?)
Fire Trolls could just be like normal trolls and just be under cliffs and stuff in fittingly hot places
Why isn't this a thing?
This could be a thing.