Azief already knows how to break through to Essence Creation.
When he broke through to Divine Comprehension realms and as he grows closer to reach Essence Creation, the knowledge of that realm comes into his mind
It is the same for every method of breaking through in this world.
The understanding of many people of why this is the way it is was that this knowledge is given to them by the system
But to those who in the know, they know that the reason why this knowledge suddenly appears in their mind is because of the All Source.
Azief on the other hand knows even deeper. There is a reason why the World Orb is called the All Source by some beings.
And those who knows its history knows how heaven defying it is the All Source is.
And so, when Azief reached Divine Comprehension leveler and then getting closer and closer to reach Essence Creation, the knowledge of breaking through is already in his mind.