It seemed this task wasn't as spell intensive as the first challenge, thus far, which in Louise's mind was a bit of a letdown. As she pressed down on the keys of the old piano, she shuttered at the sounds it was making, because it was WAY OFF KEY. And odd. Odd. very odd. Pressing down on the keys again, she sighed as she curiously thought back to the riddle

You’re looking for a lever that unlocks a door,
But to find the item you might need a particular score.
Try them all, and you will see. Something is off.
Dust covers this place like an infernal cough.

Something was definitely off with this piano and it was more than just the piano being off key. The seventh year pressed the keys again, more slowly, tilting her head in confusion, and when she got to the last one, perhaps ... that was where the item was that she was looking for? Causing the one key to feel slightly off?

If she recalled slightly from her limited musical instrument knowledge, a piano opened up. Perhaps her mysterious object was hidden inside the piano? Standing up from the bench, she wrinkled her nose from the dust and worked at lifting the lid to see what was inside. Maybe, it couldn't hurt that it would be a good hiding place for something, right?