He needs to hurry up, if the Demon and Plunder Universes army successfully destroys The Underworld, then, his plan will be in a total mess, his preparations are still not complete.
BOOM! He arrives at the Ocean Domain and transforms into his sea dragon form, swimming with a speed that cannot be seen by just a naked eye, many smaller beasts look at the direction that he had just passed through with confusion.
His figure is extremely big so the commotion he causes in his wake is quite big but because of his speed, it feels like a powerful gust of wind just passes by.
If it is on land, many will contribute it to be just a gust of wind but Ocean Domain is entirely made up of water, such a thing is impossible.
Fortunately, most beasts are not that intelligent, since the commotion does not cause harm to them, they quickly forget about it and return to their usual activities.