The Uncollectible: A Quick Run-Down of Collecting Failures.

So in the course of Pottermore, Chamber of Secrets continues to be one of the more interesting releases, as it was the one filled with the most additions to the site, with two potions(three if you count both parts of Polyjuice), a new potion book, the requirement of items to access certain things in moments (the hairpin, swelling solution and Polyjuice part 2), multiple mini-games, with gnome flinging becoming rather popular given the stale nature of dueling, and quite a bit of information regarding things that people wanted to know, like the sword of Gryffindor, and of the logic behind the Polyjuice potion's ingredients. But strangest of all was the fact that certain items were "glitched" in their collection, or limited in strange ways.

Looking into the Crystal Ball 3: Potions

I've been meaning to post this for a while, so spoilers abound!