This app translates human intention (via button clicking) into magical energy, which can then be channeled into a spell and cast.
Click the 'charge' button. If you want, focus your mind on the energy you're trying to produce. Mindless clicking is OK, but probably not as effective!
Hold the intention of your spell in your mind as you hold the 'cast' button, and release to cast the spell.
The 'cancel' button on the left will dissipate the magical energy harmlessly, if you decide not to cast the spell.