Obzedat, Ghost Council

Obzedat, Ghost Council 

CR 21 XP: 409,600
NE Gargantuan undead (incorporeal, troop)
Init +5; Senses darkvision 60 ft.; Perception +40
AC 25, touch 25, flat-footed 23 (+16 deflection, +1 dodge, -4 size, +1 Dex)
HP 337 (25d12+175)
Fort +14, Ref +11, Will +18
Defensive Abilities channel resistance +4, incorporeal; Immune undead traits
Speed 0 ft., fly 40 ft. (perfect)
Melee troop (12d6 plus 2d6 energy; DC 30)
Space 20 ft., Reach 10 ft.
Special Attacks carry off, eldritch grasp, oppressive moan, poltergeist activity, unrefined evocation, welcome to the fold
Spell-Like Abilities (CL 25th; concentration +31) 3/day—quickened wall of force
Str -, Dex 13, Con -, Int 18, Wis 14, Cha 22
Base Atk +18; CMB +22; CMD 50
Feats Ability Focus (eldritch grasp, oppressive moan, welcome to the fold), Combat Reflexes, Dodge, Improved Initiative, Iron Will, Lightning Reflexes, Quicken Spell-Like Ability (wall of force), Skill Focus (perception), Toughness
Skills Fly +37, Knowledge (arcana) +32, Knowledge (religion) +32, Perception +40, Sense Motive +34, Stealth +29
Languages common
SQ fracture
Eldritch Grasp (Su) The Ghost Council swarm’s troop attack deals 12d6 untyped damage and 2d6 energy damage (either acid, cold, electricity, or fire as the swarm chooses). A DC 30 Fortitude save reduces this damage by half.
Oppressive Moan (Su) Once every 1d4 rounds, the swarm can unleash a frightening moan as a standard action. All living creatures within 50 feet takes 15d6 sonic damage (Fortitude DC 30 for half). A creature that takes damage from the moan must also make a DC 28 Will save or be shaken for 1 minute. This is a sonic mind-affecting fear effect.
Unrefined Evocation (Su) As a standard action, the ghost council swarm can fire a barrage of scorching rays at nearby foes. They may fire up to twelve rays at creatures within 75 feet (+19 to-hit), but no more than three rays may target a single creature. Each ray deals 4d6 points of fire damage.
Welcome to the Fold (Su) As a standard action, the ghost council swarm may focus their ill will on one creature sharing its space, attempting to rend its soul from its body. The target takes 12d6 negative energy damage (DC 30 Will for half). Until the end of the encounter, the target’s attacks deal full damage to the swarm as if it were not incorporeal. If this attack kills the target, he finds his consciousness being drawn into the ghost council, but if he returns to life at some point during this encounter, he is freed from the council, and the swarm is stunned until the end of its next turn.
Fracture (Ex) The swarm has two HP thresholds, and its abilities change as it reaches different thresholds. Threshold 1 When reduced below 192 HP, as an immediate action, the Ghost Council swarm uses oppressive moan if it is available. It also becomes invisible until the next time it attacks, and flies 50 feet. This movement does not provoke attacks of opportunity. Threshold 2 When reduced below 97 HP, the ghost council swarm reduces to 9 contiguous squares as several of the spirits shake their heads and fly away. As an immediate action, the Ghost Council swarm flies 50 feet. This movement does not provoke attacks of opportunity.