Half-Brewed Potions Usually Do Not Work

This story takes place in Lily's fourth year and involves Lily becoming tired of the cries of "Mudblood!" directed towards her from some school bullies. So she takes matters into her own hands and challenges the bullies to a duel. To enhance her performance and to ensure she wins, Lily steals some of her friend's newly-brewed potion, but things do not work out as she planned…