When Cassandra watched helplessly as a wooden door suddenly appeared on a wall that had been completely bare, her eyes filled with shock.
Wentworth, meanwhile, explained:
"This is the Room of Requirement. You just need to focus, think of the place you need, and then walk back and forth along the corridor three times. It'll appear."
Then Wentworth pushed open the wooden door and led the way into the Room of Requirement. Cassandra hesitated for a moment, but followed him inside.
The room was incredibly spacious. In its very center stood a standard dueling platform. At the sight of such a marvelous scene, Cassandra couldn't help exclaiming in wonder as she looked around.
Not long after Wentworth and Cassandra entered the Room of Requirement, Dumbledore and Snape appeared outside it.
"Severus, how did you know Cassandra would challenge Wentworth to a duel tonight?"
Dumbledore looked at the bare wall where the two had disappeared and asked Snape.
Snape replied without changing his expression:
"After everything that happened to Cassandra, I was worried something might happen to her, so I specifically asked the students to keep an eye on her. As for her duel with Wentworth, that was an unexpected bonus."
"Although Wentworth was still deliberately holding back during the duel between Hufflepuff and Slytherin, we have a very clear idea of Cassandra's abilities. All we have to do is wait here and use the outcome of their duel to make a rough estimate of Wentworth's current spellwork!"
Hearing Snape's explanation, Dumbledore slowly nodded.
Suddenly, the wooden door reappeared on the previously bare wall. Seeing this, Dumbledore hurriedly said:
"It looks like the duel ended much faster than we expected! They'll be out any moment!"
As soon as he finished speaking, Dumbledore and Snape slowly vanished from outside the Room of