The technique the red knight created was a way for someone on the verge of breaking through to the Divine Trinity to be able to use the power of a Divine Trinity rank expert.
Not only was the process dangerous, but Ainz thought it was simply impossible for a normal sane person to try it, the cultivator needed to refine the world energy which was mana as a personal form of energy for the cultivator.
'Is that the reason why the red knight is so strong? Since it simply uses the power of a Divine Rank while still at the Ascender rank.'
What the red knight had done was to use his sea of consciousness to be precise his mental sphere which could be said to be the soul of a human to absorb mana in the environment and then refine until it was a personal form of energy for him.
'The sea of consciousness is like the soul of a cultivator, yet he was able to store mana in it?'