"The Spirit King should not jest!"
The Great Emperor Zhenwu's expression was solemn, an authority naturally emanating from him, "This place is indeed perilous, not suitable for a virtuous true immortal like you to reside in for long!"
Even celestial beings of immense merit and high authority, if not adept in combat, cannot survive here.
For Great Emperor Zhenwu, Sun Wukong was precisely that type of virtuous true immortal who engaged in the work of teaching and transformation.
His mana might not be weak, but he definitely was not adept in combat.
Those with boundless mana, like the Three Pure Ones, capable of creating universes and evolving wondrous laws, aren't skilled in combat; if approached closely and caught off-guard, they too could trip and fall.
That's only natural.