Eren closed the door and walked to the center of the room. He placed the crystal that was given by Xiu Ying on the floor.
He placed his foot on the crystal and crushed it under his feet. The crystal shattered into a fine powder which dispersed in the room.
Eren felt his head spinning, as his perception started changing. The space inside this room appeared to change as his bed moved farther away from him, along with the walls.
His very reality seemed to be transforming before his eyes, leaving him very intrigued. This kind of treasure was something really useful, but he hadn't even known about its existence.
He could only imagine how expensive this small crystal had been. It was only a one time use item, and the extended space couldn't be shifted to any other place. This space was fixed to his room forever.