He surpasses even the Crimson Hell Demon King of the Abyss.
But in the next second, the Human Clan's King's Treasure shatters it, as a vast tide of spirit energy whips up a storm that sweeps across the world.
The True Kings at the Mortal World's pinnacle, although they suppress The Gods using the Mortal World as leverage, are in fact also suppressed themselves.
They're like fish that thrive in a high-pressure environment, exceptionally vicious.
Take Gary Smith going into the Beast Curse Realm, frequently taking on the entire world, wielding Absolute Heavenly Passage, yet that would not work in the Main World.
Therefore, not only do True Kings from other worlds have to lower their heads when entering the Main World; when the Main World's True Kings leave, their combat strength will skyrocket, thrashing ordinary Demon Kings.