He did not go to the Land of Challenge.
It's not that he didn't have time, nor that he didn't want to go, but as the only True King realm in the West Desert Empire, the pillar of the empire, he couldn't afford this trip's risk.
Even in the True King realm, entering the Land of Challenge comes with the possibility of falling.
Indeed, a monster True King did fall.
The True Kings on the side of living beings, several were seriously injured, and it was not unlikely for them to almost fall.
For the West Desert Country Master, even if it's not a complete fall, but a temporary one followed by resurrection, it's still very dangerous. During his fall and resurrection, the combat power of the entire West Desert Empire would drastically decrease, and it would take quite some time after his resurrection to return to his peak.
During this time, the West Desert Empire could easily suffer significant losses.
Not to mention it is still the time of the Great Catastrophe.
