As for The Original White, The Original Yellow, and The Original Purple, hehe~~, why not take a look at just who the great lord they submitted to was?!
Not to mention the three of them—even if all the Primordials attacked together, that great lord could still keep them under control!
That was the difference!
All right, enough of this nonsense.
In any case, Ze'Chion had been cultivated specifically to guard against Diablo. There was no need to doubt it; he had been raised purely to guard against him!
This could not be considered King of Wisdom overstepping its bounds. After all, King of Wisdom had acted according to Rimuru's thoughts and concerns, reaching the conclusion that:
Diablo could not be trusted.
Then, after analyzing Diablo's identity, combat strength, race, weaknesses, and many other aspects, King of Wisdom had begun cultivating Ze'Chion, an existence that was practically Diablo's restraining device.
Of course, that did not mean there was no one else in the Demon Country Federation capable of taking down Diablo. In the current Demon Country Federation alone, there were fully three beings who could easily defeat Diablo, the Original Black!
Those three were none other than the Demon Country Federation's three Calamity-class existences.
Storm Dragon Veldora.
Rock Dragon King Azhdaha.
And lastly:
The Geo Archon, Morax, also known as the Martial God.
Any one of those three could take down Diablo without much difficulty!
Although Diablo was powerful and mysterious, so much so that even Mo Li could not quite see through him.
There was one undeniable fact: Diablo was currently nothing more than a Demon Duke.
Demon Dukes were rare and powerful, and their true strength even surpassed that of ordinary True Demon Kings, but there was still a limit to how powerful they could be!
No matter how