Angor could trick the senses of something weaker than him, but the near-wizard-level beings among the schools of fish, such as the Ignis Medusozoa, would merely shrug off his attempts.
However, he didn't need to trick every single fish with his illusion. Just like how he dealt with the first encounter after entering the purification garden, all he needed was to cause a small ruckus among the fishes, and they would start a fight among themselves.
Once there were enough victims inside his illusion, he quickly felt like he was in control of everything. Soon, he unleashed a unique power that began to change the minds of the fishes.
A moment later.
As he expected, only one out of every ten fishes was affected by his trick; all of which were the weaker ones in the group.
He was quite surprised to see the mightiest being of all—the Lord of Tentacles—showed a brief moment of confusion inside his illusion.