#3—Transfiguration

The Slytherins were in Transfiguration trying to turn their books into fish. Lucius was having difficulty working the spell, succeeding only in giving his book gills. He looked around at the rest of the class and saw that everyone else was in the same boat. No one had performed the spell correctly.

In mid-cast, Goyle bumped into Lucius’s arm, knocking his wand away from the book. A shriek pierced the classroom and Lucius looked to see whom the spell hit.

Narcissa was crying and flailing her arms. Her ears had turned into fins and were flapping madly, ruffling her hair.