- "Sirius sustained a bad bite from a silver snuffbox; within seconds, his bitten hand had developed an unpleasant crusty covering like a tough brown glove."
- — The effects of this powder on the skin[src]
A biting silver snuffbox in the drawing room inside Number 12 Grimmauld Place was filled with powder from a Wartcap. In August 1995, Sirius Black picked up this box whilst cleaning up 12 Grimmauld Place and got bitten by it, causing his hand to come into contact with wartcap powder. He instantly healed his injured hand and tossed the box aside.
- Harry Potter and the Order of the Phoenix (First appearance)
- Harry Potter and the Deathly Hallows (Mentioned only)
- LEGO Harry Potter: Years 1-4 (Handheld versions only)