Armchair to human

"Where a split second before there had been an armchair, there now crouched an enormously fat, bald old man who was massaging his lower belly and squinting up at Dumbledore with an aggrieved and watery eye."

- Description

This spell counteracted the enchantment to turn a human into an armchair, and was used by Albus Dumbledore in August of 1996 on Horace Slughorn.

Appearances

 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Half-Blood Prince (film)