Powering-up spells

"Now this isn't like other spells. You need to keep moving your wand in a circle to build up power."

- A charms professor teaching a student

One can increase the power of a spell by waving their wand in circles before casting a spell. The spell, once its power has been increased, will change colour from its ordinary colour to a different colour. If one attempts to charge a spell more than the spell should be charged, it will backfire in mid-air and cause minor damage to them.

Behind the scenes

 * In the fourth video game, the spell Magicus Extremos is used to replace the more generic building up of power.

Appearances

 * Harry Potter and the Chamber of Secrets (video game)
 * Harry Potter and the Prisoner of Azkaban (video game)
 * Wonderbook: Book of Spells