In the velvety shroud of a moonless night, the castle lay silent, its grandiose corridors echoing only the whispers of history. The seventh-year Gryffindor student Sirius ventured through the darkened hallways as an undisputed master of stealth and secrecy. He had just begun to make mischief when he heard a soft noise behind him. Startled, he spun around, his wand at the ready. "Well," Sirius said with a sly grin, "since you're here, how about lending me a hand with a little prank?"