Summon is a magical effect that temporarily calls forth a servant creature to fight alongside the caster. This effect is a member of the Conjuration school of magic, governed by the Intelligence attribute. Summon has a duration, but does not consist of a magnitude, area, or range. Despite their magical origin, summoned servants are not soulless. Their souls can be captured with a soul gem to be used for enchantments, and are equal in value to their non-summoned counterparts. There are twenty variations of the effect: