William lost control the moment Levi broke Kai's leg. He had already been restraining himself while Kai struggled—no matter what Kai did, he was like a son to William. Kai had spent most of his life by William's side, and they were closer than even family members.
Seeing someone he cared for so deeply getting toyed with and injured by a literal nobody made William's already clouded mind snap.
With a rage that could tear Levi apart, William burst forth, his eyes blazing with fury. He unsheathed his sword and channeled every ounce of his power into it. In an instant, he was upon Levi, his gaze burning with hatred.
Without a second thought, he swung his sword, aiming to cleave Levi in two.
But just before the blade could connect, a massive axe intercepted it, stopping the sword an inch from Levi's face. The force of the clash pushed the nearby onlookers back several steps.