After passing through the prank-filled Marauders Amusement Park and wading across the River of Grammar made up of shrieking quills, the three finally reached the end of the maze.
It was an enormous underwater cavern.
The ceiling was too high to see, and moss glowing with a faint blue light covered the surrounding rock walls, illuminating the entire cavern like an ancient temple sunk beneath the sea.
In the center of the cavern, an enormous black basalt altar floated silently in the water.
The altar gave off an ancient, ominous aura that clashed with the surrounding stillness.
On the altar, three figures were loosely bound with glowing seaweed, magically asleep and drifting slightly in the water.
They were Hermione, Cho Chang, and Pheobe's young sister, Gabrielle.
At the sight, all three felt their hearts clench.
Professor Douglas's casual remark before the competition about "a few minor side effects" now sounded like an ominous tolling bell, echoing over and over in their minds.
We have to save them!
The thought took root in all three of their hearts.
But just as they were about to approach, something unexpected happened.
A gigantic funny face made of colorful bubbles appeared without warning in front of the altar, blocking their path.
With crooked eyebrows, one eye larger than the other, and an enormous grin, the face was unmistakably a masterpiece of the Weasley Twins' twisted sense of humor.
The face's mouth suddenly opened wide, and a magically amplified voice rang throughout the cavern, reciting a piece of doggerel they had recorded themselves:
"Brave knights come to save the fair, but don't rush to shed tears of despair."
"The sleeping spell is strange indeed; three kinds of saliva are what you need."
"Drink one wrong cup, your hair turns to grass; drink two wrong cups,