Magic Satellite

Magic Satellite is a runic spell that appears in Ultima Underworld II.

Spell Description
This spell creates a magical purple sphere of energy, which circles the caster as they walk. When a creature approaches the magician, this satellite will begin to assail them a discharge of its power, resulting in an explosion. Multiple instances of this spell may encircle the caster at the same time and will cumulatively attack when their sphere of influence is invaded by a foe.