MagicPotion
Skele-Gro
A potion that regrows bones. After Lockhart accidentally removes the bones from Harry's arm while trying to mend it, Madam Pomfrey gives Harry Skele-Gro. Regrowth is painful and takes the night.
In the books
Harry Potter and the Chamber of SecretsChapter: 10
Madam Pomfrey gives Harry the potion after Lockhart accidentally removes the bones from his arm.