Armadillo bile is an ingredient used in the Wit-Sharpening Potion.
In March of 1995, Harry Potter deliberately spilled his armadillo bile at the end of Potions class so he could eavesdrop on a conversation between Severus Snape and Igor Karkaroff while he cleaned it up.
- Harry Potter and the Goblet of Fire (First appearance)
- Harry Potter and the Half-Blood Prince (video game)
- The Road to Hogwarts Sweepstakes