First, Yan Ao covered the energy pillar with his Psychic Force Field, and then made a wisp of psychic energy burrow into the interior of the pillar.
Through the Psychic Force Field, Yan Ao "saw" an azure blue world, and he cautiously controlled that wisp of psychic energy to go deeper.
He did not know that the risks of doing this were extremely high. Improper operation would lead to a backlash from his psychic energy at best, or direct brain death at worst.
Chapter 121