Whales

Pierce immediately selected an undead from his undead army and made him stand at the edge of the Sky City before kicking it.

After all, he did not know if there would be any danger in the sea, and sending this undead was equivalent to having a portable remote controlled clone. Even if there was danger, he would not suffer anything.

He connected his consciousness to the undead.

The wind slowly blew past his ears, blowing at his face like sharp blades, but he did not feel any pain since he was only controlling the undead and sharing its vision.

Pierce watched as he got closer and closer to the huge whale. Then he controlled his descending speed.

He could see the huge whale flapping its flippers in the water, and the fish tail behind it was swaying non-stop. And under this huge figure was a bottomless abyss.

Pierce suddenly understood why the ninth invasion was blocked.