The life vibration energy of a Dark Ultimate Level entity was something Casio would not mistake. The roots and stems of the plants he had just eradicated with his Magic Puppet Secret Weapon were of a quality comparable to the flesh of the Moon God, evidently surpassing the ordinary Catastrophe Spirit Level.
Only a Dark Ultimate Body could be the Dark Ultimate Entity!
Thus, the dense fog that perennially enveloped the Immortal Islands, the relentless storms nearly day and night, and the hazardous environment of the island, could they all be related to this Dark Ultimate Entity? And the appearance of such a Dark Ultimate Body on the Immortal Islands, where the Ancient Ruins were located, did this imply a certain connection between the two?
Besides, Casio had once probed the Immortal Islands with the Devil's Book.
He had not received any dangerous information about the Dark Ultimate Entity.