The gravity ball spell fires a black orb that rolls slowly in a straight line away from the caster, in whatever direction he or she was facing when using the spell. The gavity ball will exert a pull on all nearby objects. As it accumulates objects on its surface, the pull increases and larger objects are pulled in. When encountering an obstacle, the obstacle is either attached to it, or pushed, where the force is determined by the speed and mass, like for any impact. When failing to push the obstacle, the gravity ball and all its assorted objects burst against the obstacle, dealing damage equal to push force (i.e. determined by speed and mass).