Renshai, book 3: Child of thunder
Mickey Zucker Reichert1993

Colbey, last of the Renshai, has completed his duties in the mortal world. Now he must face the Seven Tasks of Wizardry and learn whether he is truly the next Western Wizard, the keeper of neutrality. But even as he endures these god- controlled challenges, he learns there is an eighth, far more dangerous task. Dangerous not only to himself but to the worlds of both humans and gods. And even if he survives it, there are those among the gods, wizards and mortals alike who will unite against him - and their actions could catalyse destruction on a scale never yet conceived. Each volume of The Last of the Renshai is a stand-alone adventure; they can also be read in sequence. Centred on the adventures of a lone hero, they form an engrossing sword-and-sorcery epic.