Area of effect

An Area of effect refers to both the shape and the volume a spell occupies when it is triggered.

There are seveal distinct types:
 * Sphere - All within a given radius
 * Cylinder - All within a given distance, and in the direction the spell is aimed up to the radius size
 * Cone - All within a given distance, and in the direction the spell was aimed up to the arc size
 * Target - Only effecting the actual target of the spell