Although it had managed to reach the Fake Dan realm in the past, it had actually not realized its maximum potential!
What the Cerberus wanted to do now was to grab every opportunity to set the most stable foundations in every realm and minor stage. At the same time, since it was cultivating the Xiantian realm using its knowledge of a Fake Dan expert, it was like answering a primary school student's questions using the knowledge and experience of a university student. It was bound to discover the errors in its previous cultivation.
This was not an exaggeration in any way, because the difference between Controlled Dan and Xiantian was truly that huge! Anyone in the Controlled Dan realm could be said to have stepped into a higher level of existence!
The most obvious mark of a Controlled Dan Heavenly Expert was that one could stay suspended in midair without any external aid. Although they could not hover in midair indefinitely, this was still a large leap forward for any life form!