King of the Labyrinth, Vol. 2 (light novel)

Having both combatants walk away with their lives was not the outcome Panzel had expected from his bout with the Minotaur. But with his kingdom in peril, his priorities were clear. Years have passed since that fateful day. Within the depths of the Sazardon Labyrinth, the Minotaur hones its skills, spurred onward by the memories of its close calls in battle. In time, another worthy challenger would appear before it. His name: Zara, the son of Panzel.