I have the feeling this guy's not just some little dude behind a curtain.
From the preview:
Oz travels from Outcast camp to Outcast camp, asking to trade his deadly talents in exchange for food and shelter when the weather is harsh. Sometimes he attracts pit fighters from local ludi, taking them under his wing on a battlefield to show them a trick or two before bringing them back to their War Chiefs. Wielding his favorite weapons he bashes or hacks his way through his foes, knocking those who get too close dizzy with a stone-splintering headbutt if he must. His arena skills are so honed that it is as if no one can touch him, although his body is so weathered and scarred that pain seems not to register when they manage to. He fights on; never backing down, never asking quarter, and assuredly never giving mercy.