Instructions
Complete the Dragons level, which is the second level in the fourth year. After the level is complete, you are taken back to Harry's dormitory room at Hogwarts.
Follow the ghost to reach the Defense of the Dark Arts classroom. A short interactive movie plays showing you how to use the Reducto spell. After the interactive movie, you must rescue five students trapped underneath silver rubble.
Destroy the rubble on top of the five students using the Reducto spell. After rescuing the students, Harry and his friend can now call on the Reducto spell at any time.
Press and hold the "C" button on the controller to activate the spell wheel. Select "Reducto" from the spell list.
Press the "Z" key to use Reducto. When the spell is used on a silver lock on a door, the lock is destroyed and the door opens, revealing new areas to explore.