Violet had been dreading this part of the brewing process, which was probably why she was taking rather a long time about it, but there was no avoiding doing it now that the class was moving on. Clamping on the nose clamp as tightly as she could stand it, she got out the Mountain Troll dung (Great Merlin, two whole cups of it!) and began hastily adding it into her potion, trying not to retch in the meantime. Then she cast a quick Evanesco on the cups to get rid of any residue and turned to get her mortar and the lemon, hoping the process of juicing would take her mind off the smell. Once that was done, she mushed it together (Don't think of the smell, Don't think of the smell...) and added it into the potion as fast as she could.

The only thing remaining was to cast the spell:
"Dilapsus" she exclaimed, jabbing viciously with her wand. Finally, done! She hurried to fill her flask with the stuff and sealed it with both a cork and with magic (not wanting to take any chances). Then she vanished the rest of the mess in her cauldron--"Evanesco" and sighed with relief.