Sphere of ultimate destruction

Sphere of ultimate destruction is a spell that conjures a featureless black sphere of nothingness that destroys everything in it's path. Creatures who are struck by the sphere have a slim chance of surviving, but will most likely be disintegrated, along with any non-living matter. Upon striking a creature, the sphere will stop moving and wait to be directed to a new target by it's caster. If the sphere moves beyond the range of the spell, it winks out of existence.

For casting, a pinch of dust from a disintegrated creature is required.