C23 The Emperor's Green Hat

"Huh? Why can't I open it?"

Jin Buhuan aimed the Universal Key at the keyhole. After a while of hard work, he actually couldn't open it. This was strange. His Almighty Key was omnipotent, but why did it fail this time?

With doubt and confusion, Jin Buhuan observed the keyhole with interest. He discovered that this key lock was specially made