Casting Time 1 standard action
Components V, S, F (a masterwork piercing or slashing weapon)
Range 30 ft.
Area 30-ft. radius emanation centered on you
Duration 1 round/level (D); see text
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 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 interlocutor 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.
Pathfinder Roleplaying Game Planar Adventures © 2018, Paizo Inc.; Authors: Robert Brookes, John Compton, Paris Crenshaw, Eleanor Ferron, Thurston Hillman, James Jacobs, Isabelle Lee, Lyz Liddell, Ron Lundeen, Joe Pasini, Lacy Pellazar, Jessica Price, Mark Seifter, F. Wesley Schneider, Todd Stewart, James L. Sutter, and Linda Zayas-Palmer.