Andromeda's eyebrows raised a fraction as Mademoiselle Rookwood's spell hit the Slytherin with full force. Her hands snapped to her sides and she keeled over like a sack of potatoes.

The thought briefly crossed Andromeda's mind to conjure a pillow for Mademoiselle Whitledge to fall on to, however, she decided against it. Both girls were nearing the end of their schooling with the Slytherin already of age. They knew what they were getting into when they signed up for this duel.

The matron watched as the girl hit the floor, and she winced. With a breath, she cast the counter-spell. Andromeda gestured to the Hufflepuff. "Mademoiselle Rookwood wins this round - Mademoiselle Whitledge when you've quite collected yourself, s'il te plait begin the next."