This spell allows the caster to summon a single Lesser Daemon. A Lesser Daemon will take the form described in the Bestiary. Once summoned, a Daemonic Guardian will appear within 6 yards of the caster. If the caster successfully controls the Daemon, it will serve for 1 hour per level of the caster and then disappear. If the caster is slain, the Daemon disappears immediately. Only one Guardian may be summoned at any one time and the character must have summoned it previously and struck a bargain .