Harry grinned and took out the sigil stone from his depthless pocket. He handed it to Hermione, watching at many teeth flicked out from the stone like flares from a depiction of the sun. Then they headed back to the gateway of the pyramid. There, set into the stone, was a recess that was the exact shape of t he sigil key. Hermione joined the two together, turning them to seal the pyramid with a little hiss of air.