Shadow Invasion

Conjuration (Summoning)
Level: Artificer * 4, Magus * 4, Sorcerer */Wizard * 4, Summoner * 4
Components: V, S, F (a masterwork piercing or slashing weapon)
Casting Time: 1 Standard Action
Range: 30 ft.
Area: 30-ft.-radius emanation, centered on you
Duration: 1 round/level; see text (D)
Saving Throw: None
Spell Resistance: no
  Using a slashing motion with the spell's focus as part of the casting of shadow invasion, you cut open a rift to the Plane of Shadow that fills a 30-foot area with shadowy energies. This area is stationary and becomes dark and gloomy, reducing the light level by one step (as Darkness). Certain spells are enhanced within the area; spells of the shadow subschool that have reduced effects when disbelieved (such as shadow evocation) have their reduced effects increased by 20% (to a maximum of 90%) when determining their effects on targets within the area of shadow invasion. In addition, the rift created by shadow invasion has a chance of attracting attention from the other side, and the spell can be inverted to bring these watchers through. When shadow invasion is dismissed as a Standard Action, there is a chance that a single evangelist kyton (Pathfinder RPG Bestiary 185) will be summoned under the caster's command (as per summon monster V). This chance is 5% for every full round that shadow invasion was active. If the Caster Level of shadow invasion is 16th or greater, this effect summons an interlocutorB3 kyton instead. A kyton summoned this way remains for a number of rounds equal to what the remaining duration of shadow invasion would have been had it not been dismissed. Successfully summoning a kyton this way is a lawful and evil act, as though casting a spell with the lawful and evil descriptors.