Quote:
Originally Posted by
Waddles
"Quite right," Svensson told the Slytherin girl. "Piertotum Locomotor is, like you mentioned, a mobilizing spell."
"Very good," Svensson said. "Thanks for the historical reference, too."
Svensson set down the chess pieces he had been holding and looked solemnly at the class. "Kiri said that Piertotum Locomotor transforms objects. It does not charm them. What is the difference between a spell like Piertototum Locomotor and, say, a charm that simply animates an inanimate object?"
Difficult question. Kiri picked up the chess piece and rolled around in her hand absent-mindedly as she tried to figure out an acceptable answer. Finally, she raised a hesitant hand.
"The difference between a charm and a transfiguring spell is that a charm only sort of...
acts on an object, transfiguring, er, changes the nature of it." She hastily tried to think of an example. "Say... casting
Wingardium Leviosa to make this chess piece," she held it up, "fly is a charm. But, er...
adding a pair of wings so that it would be able to fly itself would belong to Transfiguration." She paused for a moment. "Possibly?"