"Phew! Lucky for me Ran Deng and his cohorts didn't make a move, or I, Old Sun, would have been in big trouble today!"
While a host of Heavenly Dao Saints felt a dark cloud looming over them due to Sun Wukong's terrifying combat power and his brash behavior, Sun Wukong had already ridden escaping light flying out thousands of miles and landed on a small island in the Northern Sea, his face as pale as death.
Ran Deng Buddha was right to think this way—though Sun Wukong had slain the Evil Emperor, it was not without cost.
As the saying goes, killing a thousand enemies costs one eight hundred of their own—although Sun Wukong had the Chaos Dao to replenish what he spent, he still exhausted quite a bit of Chaos Primordial Force. Most crucially, there was the Evil Emperor's final counterattack before his death.