The Half-Blood Prince's Copy of Advanced Potion-Making

• Type: Annotated Textbook
• Owners: Severus Snape (as the Half-Blood Prince), Harry Potter
• Maker: The textbook Advanced Potion-Making was written by Libatius Borage; the crucial annotations and invented spells were created by Severus Snape.

The object is a heavily used, tattered, and battered copy of the standard Hogwarts sixth-year Potions textbook, Advanced Potion-Making. The pages are filled with handwritten notes, corrections, and revisions to the original text, scrawled in a tiny, cramped script. These annotations offer alternative and superior methods for brewing the potions listed. On the inside of the front cover, the simple declaration of ownership is written: “This book is the property of the Half-Blood Prince.”

While the book itself is not enchanted, its true “magic” lies in the genius-level annotations made by its original owner. These notes provide insights and instructions far beyond the published text, effectively functioning as a master-level guide to both Potions and spell-creation.

• Improved Potion-Making Instructions: The Half-Blood Prince corrected nearly every recipe in the book, providing more efficient and effective methods.
  • For the Draught of Living Death, the Prince instructs the brewer to crush the Sopophorous Bean with the flat side of a silver dagger to release its juice more effectively, rather than cutting it as the official instructions direct.
  • For the Elixir to Induce Euphoria, the Prince's instructions include adding a sprig of peppermint to counteract the side effects of excessive singing and nose-tweaking.
  • These superior instructions allowed Harry Potter to excel in Professor Slughorn's class, making him appear to be a [[