At the split second that the Demi was forced back.
The Asura King shouted: "Barrier of Retribution!"
The 13 skeletons jumped into the air, splattering the blood on their bodies all around.
The entire room was dyed in a deep red light.
The next moment, both the red-robed old man and the 13 skeletons all disappeared without a trace.
Where they disappeared, a red-glowing irregularly-shaped entrance appeared.
The Asura King kept up chanting the Oath to maintain the entrance.
Space started to distort.
The Great Ghost General appeared, wearing his jet black armor and holding a jet black blade.
"How long can you hold him?" the Great Ghost General asked.
"If you can keep him busy enough to not cast a spell, he'll be stuck there for a very long time" the Asura King stopped a bit to answer.
The Great Ghost General laughed in a frenzy: "Leave it to me, I'll make sure he's unable to pay attention to anything at all"