Olly only vaguely recognized most of the Slytherins around him. There was a first year, and a few older students. He didn't know the names of any of them. He recognized the girl prefect too when she came along but, uh, what was her name? One of the girls was calling her Dot, which could not be her real name, could it? It was the same girl who'd told him the spell. Diffindo. Cool.

"I can work on the bottom," he offered. Dot looked like she had the top covered, and Olly did not really want to have to climb off the ground. Not yet, at least. So he found a big branch close to the ground and pointed his wand. "Diffindo." He severed one of the biggest branches that was pointing out towards him and not where it should be at all if they wanted it to look like a snake. He took the branch and threw it into the pile that the prefect had started with her branch. So far so good, but they needed everyone to help if they wanted to get it done on time.