Hand of Fate. Part 2: Despair

I hope the author won't be offended if I give a small hint: the ability to traverse the desert is related to the hero's stats – two specific stats are required, and then it's all good. To be honest, I didn't figure it out myself; the author gave me a hint.
But after crossing the desert, you'll encounter another problem: without Chaos and Dark Magic, it will be impossible to deal with the Hellspawn...
Good luck – the map is truly magnificent!