Ocean Master!
The white staff of the old man was a legendary magic weapon.
Once the white light of his magic touched Sebastian's main Megalodon body, the body seemed to become paralyzed as he became totally still.
His body was not just paralyzed, Sebastian felt like his magic organ was locked by a key as he was restricted completely in the literal sense of it.
Sebastian was shocked but he was not resigned to letting his fate be decided by a random old man. Not after all the hard work that he put in, not after all his achievements, not after he already got this close to his goal.
"Respond for me!"
For the first time, Sebastian fulfilled something that he had only theorized before now. After his adventures in the Ocean King's Domain World, he aspired to develop his telekinesis powers to an extent where they could replace his magic.