Why does not flitwick cast this spell on Hogwarts walls during the battle of Hogwarts?
--18.104.22.168 23:55, 8 August 2009 (UTC)
- Perhaps the charm cannot be cast on something so large, or, if it can, it would take too long to perform in the midst of a battle. ★ Starstuff (Owl me!) 21:58, 15 August 2009 (UTC)
he had pretty of time before. They was warned a hour before battle. :/