Beautiful destruction

"All the monsters swiveled around. The piece of light rose high in the sky, and the monsters looked confused. In their last moments of life, the light exploded." -Anonymous

This spell is amazing, known for being "Power in its purest form." It is a ball of white blinding light that rises up out of the ground, and then any monsters in a 200 foot radius. It pulses in and out, until almost all the monsters around it are gone. It has a great cost though: Most of your soul. After casting this spell, you will become temporarily cripple.