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"Knock three times on the door with a constant rhythm. Wait for five seconds and then grab the knob, turn it counter clockwise and enter with your left foot first."
Raven muttered as he sat on the bed.
"Take the this diary and place it on the ground under the bed. Lay on top of the bed and wait until you heard a sound."
He did was her said and waited. It didn't take long before he heard a movement under him which made him smirk. He got up and pushed the bed aside, he then saw a staircase leading down to a dark place. The book was gone because it was the key to reveal this secret.
Believe it or not, Raven never knew of this method in his past life. He unknowingly did all the requirements which in turn allowed him to go towards this secret underground passage.