[quote=@RPforthatPR]
Meh, so is conjuring up fire with your bare hands :D. But sure, 40° is fine then, just wanted to emphasize he's in sync with the heat and fire. It's true 70° would definitely not be good when 43° degrees would kill him.
[/quote]

That's actually a valid point, but still. You don't want to sentence your guy to never be able to be touched by another human again (e.g. pretty lady), would you? :D Not to mention how much would his horse suffer...

You can emphasize him being in sync with the heat and fire by stating that he just cannot get burned, period. Why? Well, because he's protected by magic. And I never said he cannot burn someone else by boiling their blood ;)