While Douglas was explaining, Snape swept a sharp gaze around.
He found himself on a platform inside a cavern. On one side, steps seemed to lead down, while statues stood in front of the other two walls. No matter how he looked at it, this hardly seemed like an elaborate ruin.
He turned back to Douglas with a disdainful look, thinking, Surely this fellow doesn't expect us to set up a secret realm game in a bare place like this.
Douglas first led everyone to the side with the steps. The tide was rising, and seawater had already flowed through the secret passage and submerged half the steps.
Douglas snapped his fingers, and a ball of light swiftly sank into the seawater, revealing the entrance to a secret passage only three feet wide.
"I've placed an Anti-Apparition Charm over the entire cavern. This secret passage was originally the only way in, but now I've filled it with all sorts of magical mechanisms.
"Normally, nothing looks out of the ordinary, and seawater can flow in and out as usual. Once a wizard enters from outside, the various magical traps inside will activate.
"In particular, I've placed a large piece of anti-magic stone in the middle of the passage... er, Professor, reimburse me for that later..."
Dumbledore's half-moon spectacles could not help bobbing up and down. If the other four Heads of House had not been there, he would really have liked to ask this fellow what had happened to all the materials he had given him earlier. Had he eaten through them all already?
Douglas blinked cheerfully and continued:
"The magical traps in the first half of the passage can only hold back ordinary wizards and Muggles. On the one hand, they're there to prevent ordinary wizards from wandering in by