Xu Yan looked toward a barren island ahead, his face filled with astonishment.
The island was moving slowly.
It looked like a floating island, but the island was utterly barren, without a single blade of grass or tree.
The island was not small, spanning more than ten li. It floated on the sea, drifting slowly onward.
The Azure Sea's Ten Thousand Islands referred to islands where martial forces existed and humans gathered; it did not mean the Azure Sea Realm had only ten thousand islands.
No one knew exactly how many islands existed in the vast ocean of the entire Azure Sea Realm.
An island spanning ten li was nothing special in the Azure Sea Realm. It was merely a tiny island too insignificant to count.
What drew Xu Yan's attention was not the island itself, nor the fact that it could move. Rather, this island was not actually an island.
It had been disguised by a gigantic black turtle.
Although this gigantic turtle had done its utmost to conceal its aura, merged itself into the ocean, and disguised itself as an island, it still could not hide from Xu Yan.
"Not a native turtle!"
Xu Yan immediately became interested.
The aura around this gigantic turtle clearly did not belong to a divine-realm spirit beast, much less a sea beast of the Azure Sea Realm. It was a lifeform from beyond the World.
He thought of some rumors concerning the Azure Sea Realm's Heavenly Cavern. In the past, some lifeforms had escaped from the Heavenly Cavern and gone into hiding in the boundless ocean. Every time an Immortal Celestial Venerable of the Azure Sea Realm inspected the entire realm, they would discover some hidden outsiders.
With this gigantic turtle's disguise, even an Immortal Celestial Venerable absolutely could not discover it!