"There's another layer of mechanisms outside?" Senior Brother Hai asked in surprise.
"Yes. It's a mechanism similar to the Dragon-Breaking Stone. It can even invert the formation. I haven't studied it much, but I know exactly what this grand formation is for. It will activate a backup defensive formation to trap us, then activate every mechanism in the inner formation and surround us from all sides." Elder Mu said.
We found ourselves in a world that looked like a sandstorm. When I looked back with my Yin-Yang Eyes, I saw that quite a few corpses had inexplicably appeared around us. Every one of them wore battle robes, and all of them were at the Corpse King level. Several were even Corpse Emperors. They were all charging toward us.
"Get under the pond! Isn't there still a large gate inside?" I leaped onto the pond's steps first and hurried downward.
Senior Brother Hai followed, while Elder Mu was a ghost and simply flew down into the pond, where he began fiddling with the formation behind the gate.
I looked upward. Golden clouds churned as several Corpse Emperors and a host of Corpse Kings leaped down from above the pond, crashing to the ground in a clattering heap. The corpse soldiers standing in the passage were fine, but those that fell into the muck were out of luck. Before long, they had become skeletons! He Xiu's technique.
"Hold them off! I'll be done soon!" Elder Mu said. He flew back and forth, probing the walls for mechanisms, occasionally knocking bricks away and manipulating the mechanisms inside.
If Elder Mu had never been here before, even I wouldn't have believed it. Otherwise, how could he be so familiar with starting and shutting them down?
Two Corpse Emperors and seven or eight Corpse Kings