The Wrestler and the Spear Fisher — Lawrence M. Schoen

Twin sons of an island chief wage war against one another for the right to lead their people. One is a great warrior , the other a great provider, and eve the island's guardian spirits are unsure who should lead, and so they meddle and declare a contest between the two. But some of the spirits meddle further, causing one of the brothers to experience a waking dream of his own brutal death over and over any time he closes his eyes.