One can't blame the zenith realm expert, for him to arrive at such a level he must have seen his fair share of experts, but nit once had he seen someone with a domain at such a young age, this was what astounded him, moreover the space domain seemed to be filled with some strange essence he couldn't decipher.
He waited for a moment and studied his surroundings, he could see the superpower in Mark's brother hand, he was thinking of how he would defeat someone that had grasped the essence of a superpower…
The essence of a superpower was the ability to alter the true form of a superpower, for instance someone with a superpower that grants him a multiply in the power output of his attacks, if they should master the essence of their super power they would be able to have unique effects, breaking the limits of their super power. If the superpower only applies to an element, they could apply it to other element.
