The days following her second run in with the American freak had Pansy at her most volatile and she was intentionally cruel to anyone and everyone who crossed her path. She hated the younger Slytherin for subjecting her to that rat army and for stealing Draco away from her and Pansy was out for blood but she was smart enough to not launch a direct attack on the little snake because while the younger girl was small it was clear she was not to be underestimated.
The sixth year was even more furious that the stupid bint had been true to her word and not one person seemed to have any knowledge of the rat army and Pansy hated that the younger girl had so easily trapped her with it. This war was now about more than Draco though he was the main reason for Pansy.
She had stayed up all night stewing in her humiliation and anger until she was ready to explode and a new idea took flight in her twisted mind. Pansy made an early start on Saturday to Hogsmeade and straight on into the book store there in search of a book she could have gotten at the library at the school but that would have meant questions and it could have led back to her and discretion was important here and she got lost among the shelves of books completely focused on finding the one she would need to brew polyjuice potion with.