The Sky That Broke the Hills by T.C. and R.E. Rubright

Young Feldregor “Slaga” Boyden is a mim, a military indentured man, in a backwater army post in Stheara. As he and his friend Floort try to pawn a mysterious watch, he learns painfully that he was born with a condition called sharna macha, in which contact with magic makes him violently ill even as it provides protection from it. Just as Floort is about to be unjustly hanged, the fort is attacked by a fierce band of uplanders and a powerful, unseen mage. Slaga escapes with Floort and a former enemy, Major Dietrick. They go in search of Bill Skye, the Master Witch Warden. He alone can train Slaga to tame his affliction and turn it to his advantage. On the road they encounter cutthroats, cavalry and bounty hunters, meet a wayward airship and more, while Slaga learns what he can do to magic and what magic can do to him.

Category: Science Fiction – Adventure