C514 The Asura King Peerlessly Tyrannical

Strictly speaking, the sea of blood was not in the Underworld. Instead, it was in the Nine Nether Domain.

However, the blood sea was indeed connected to the Underworld, and one branch of the blood sea flowed into the Underworld.

If he could not suppress them, and let their souls and souls be tainted by the sea of blood, then he would go all out and become a nuisance