Under Sunless SkiesSpell 9
Source Pathfinder Impossible Magic
Traditions Arcane, Divine, Occult
Cast
Cost obsidian and sunstone from the Darklands worth
Duration 1 minute
Area 1-mile burst centered on you
A long-forgotten army in the Darklands attempted to clinch a crucial battle by blacking out the sun with an impossible spell. The sun goes dark across the entire area of the spell, manipulating your enemies and giving your allies great resilience. The spell's area comes under a 9th-rank darkness spell. You and all allies in the area gain greater darkvision, 40 temporary Hit Points, and a +3 status bonus to saving throws for the spell's duration. Enemies within the area take a –3 status penalty to Will saving throws.
Whenever you Fuel Under Sunless Skies, you cast a 9th-rank command spell without expending a spell slot, targeting all enemies within the area. You must give the same command to all enemies.
Lethologic Mark Your sight becomes easily affected by light. When first exposed to bright light, you become Blinded until the end of your next turn. After this exposure, light doesn't blind you again until after you spend 1 hour in darkness. To heal this mark, you must drink a potion created with a vial of black blood created by the Groetan hags of the Sightless Sea.
Traits
A rules element with this trait is one-of-a-kind. The DC of Recall Knowledge checks related to creatures with this trait is increased by 10.
ConcentrateAn action with this trait requires a degree of mental concentration and discipline.
DarknessDarkness effects extinguish non-magical light in the area, and can counteract less powerful magical light. You must usually target light magic with your darkness magic directly to counteract the light, but some darkness spells automatically attempt to counteract light.
ImpossibleAll impossible spells have the impossible trait, which labels them as spells that can be cast only once in a creature's existence. After casting a spell with the impossible trait, the same creature can't cast any spell with the impossible trait ever again. An hour after casting the spell, the caster starts experiencing the consequences detailed under the spell's lethologic mark entry. The entry also includes how the effects of the mark can be healed. Spells with this trait are also more difficult to counteract. Any counteract check against the spell gets an outcome one degree of success worse than was rolled, and any effect that would automatically counteract the spell fails. Spellshape effects cannot be applied to impossible spells.
ManipulateYou must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.