Once you've navigated through the labyrinth, you will eventually confront the Minotaur. This is a powerful Myth Unit with high health and attack. Before engaging, ensure all your units are as healthy as possible. If you found any temporary power-ups or allied units within the maze, now is the time to use them. Position your units strategically; typically, you want your heroes (especially Arkantos) to engage the Minotaur directly due to their bonus damage against Myth Units. If you have any ranged units, keep them at a distance, focusing fire on the Minotaur.
The Minotaur often has a special attack, like a charge or a powerful melee swing. Try to micro-manage your units to avoid these attacks if possible, or pull back heavily damaged units. If you have any God Powers that can stun, slow, or damage the Minotaur, use them to gain an advantage. 'Bolt' or 'Shockwave' can be particularly effective. Focus all your fire on the Minotaur until it is defeated. Once the Minotaur falls, the mission will typically conclude, or a new path will open, allowing you to escape the maze.