Retrorgenus

Spell Name: Knee-Reversal Hex

Incantation: Retrorgenus

Pronunciation: reh-TROR-jen-uss

Spell Branch: Charms

Magical Discipline(s): Hexes

Appearance: A pink-and-white flash of light

Description: Causes the knee joints to reverse themselves, leaving the leg bending backward (like a bird's legs) rather than forward. The reversal itself is momentarily painful, and attempts to walk on reversed legs are very difficult. Can last indefinitely until cured, if cast forcefully enough, but at the least a few days.

Regulations: Legal

Skill Level: Advanced

Etymology: From Latin retrorsum, “backwards”, and genu, “knee”

References:

• Cast by Gertie Keddle on an early Quidditch player, as noted in Chapter Three of Quidditch Through the Ages.
• Sasha Schlagenweit [1]
• Jebediah Layton uses it on Lucinda Temple[2]

Notes: