A Talking Teleportation Array

"Sir! A demon is here!" The moment Zou Mo opened his door in the early morning, he was so startled that he almost dropped to the ground.

A cloud of black mist floated in the corridor, roaring shrilly, "Hahahaha! I can never die; how can you deal with me with your weak trick?!"

Fang Qi opened his door with sleepy eyes. "What's this noise outside?"

A door-shaped engraving appeared on the wall at the end of the corridor between Fang Qi's room and Zou Mo's room. 

However, this door didn't have a handle, which meant that it couldn't be opened from the outside.

The complicated patterns around the door frame showed that this door was actually an array.

A dark-red cloud floated in the corridor with a faint mist connecting it to the center of the wooden door covered by complicated patterns and an engraving of a pale golden demon face.