Yama Island.
The full black-robed King Yama's eyes flickered as he watched the scene outside the 1st concealed island on the holographic screen, deeply falling into thought. The overwhelming might displayed by the Great Tang Empire made him apprehensive and fearful. However, he still had two trump cards at hand that kept him from withdrawing to the Nine Nether Underworld.
The first trump card was the great array he arranged outside Yama Island. It had a total of 18 layers, with each layer more powerful than the previous one. Unless the attacker had power comparable to an Immortal, it was impossible for anyone to destroy them.
The second trump card was his own strength. Although he had yet to reach the Immortal Stage, his strength was comparable to a Great Ascension Stage cultivator. With his strength, he was still able to fight back against this army of tens of thousands of cultivators.