Kahn officially acknowledged Romulus as his master after hearing his plans.
There was no shame in accepting the truth about someone mentoring you becoming your master in all senses.
Because the one who does not respect their teacher can never truly learn from them in the first place.
Now, it was time for Kahn to start his training for real.
First, he tried to understand the basics of Harnessing explained by the peak 7th stage saint.
Like the word implies, one must 'harness' the world energy. But it wasn't just as same as absorbing it. Rather, refining it using your own body as a medium and then elevating it to the next level.
And then use it to incorporate into their attacks.