Follow Malfoy.

You tiptoe through the trees, trying not to make any noise, though you aren't very successful. However, the animals that live in the Forbidden Forest are noisy themselves, and Malfoy doesn't turn around. In fact, he help you follow him, using wandlight to make his way through the forest's gloom. Malfoy doesn't look like he's going for a stroll; he knows exactly where he's going.

You reach Malfoy's destination much faster than expected. Malfoy disappears between two trees, and you just manage to avoid stumbling into the well-lit clearing. Two other people are waiting there; you recognise them as Slytherins from your year – Blaise Zabini and Theodore Nott.

"What took you so long?" Zabini asks crossly.

"I got held up", Malfoy replies, but refuses to elaborate. "How's the idol?" he asks.

"It's growing stronger", Nott replies, his reedy voice containing a suggestion of fear.

You now focus of the object Nott is talking about. In the centre of the clearing is what looks like a lump of black wood, only differentiated from the surrounding ground by a sickly red glow it emanates. On closer inspection, you realise that it's a really crude sculpture of a person, with an out-of-proportion head and cock. The Slytherins now kneel around the statue, and begin to chant softly, to softly to make out what they're saying. You feel a wave of hatred and anger spread out from the statue, and the red glow increases. You know something bad is about to happen. The red glow continues to increase, and you find that you can't tear your eyes away from the statue.