rare lg gargantuan dragon electricity 

Perception +32; darkvision, scent (imprecise) 60 feet

Languages Auran, Celestial, Common, Draconic, Elven, Infernal, Sylvan

Skills Acrobatics +28, Athletics +35, Deception +28, Intimidation +32, Religion +34, Society +26, Stealth +28, Survival +28

Str +8 Dex +4 Con +5 Int +4 Wis +6 Cha +6

Mist Vision Fog and mist don't impair a sky dragon's vision; they ignore the concealed condition from fog and mist.

AC  42; Fort +31, Ref +28, Will +32

HP 335; Immunities electricity, paralyzed, sleep

Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 38 (page 305)

Speed 60 feet, fly 160 feet

Melee [>] jaws +36 (magical, reach 20 feet), Damage 3d10+16 piercing plus 1d12 electricity

Melee [>] claw +36 (agile, magical, reach 15 feet), Damage 3d10+16 slashing plus Grab

Melee [>] tail +36 (magical, reach 30 feet), Damage 3d10+16 bludgeoning plus Grab

Divine Innate Spells DC 42; 4th gaseous form, invisibility; 1st feather fall, gust of wind

Breath Weapon [>>] (divine, electricity, evocation) The dragon shoots a ball of electricity that deals 9d12 electricity damage and 2d12 sonic damage in a 30-foot burst within 60 feet (DC 40 basic Reflex save). They can't use Breath Weapon again for 1d4 rounds. See divine lightning below.

Coiling Frenzy [>>] The dragon makes one claw Strike and one tail Strike in either order, each against the same target. If either Strike hits, the dragon automatically Grabs the target.

Divine Lightning (divine) A good sky dragon who worships a deity channels divine power through its attacks, making them more effective against fiends and undead. Any electricity damage it deals becomes good damage against fiends or positive damage against undead.

Draconic Momentum The dragon recharges their Breath Weapon whenever they score a critical hit with a Strike.

Greater Constrict [>] 3d10+11 bludgeoning, DC 40 (page 305)

Perfected Flight A sky dragon can hover in place without spending an action, and they automatically succeed at all Acrobatics checks to Maneuver in Flight.

Stunning Electricity [>>] (divine, electricity, evocation, incapacitation) The dragon rapidly coils, then unleashes crackling lightning that deals 5d12 electricity damage in a 60-foot emanation. Each creature in the area must attempt a DC 40 Fortitude save; regardless of the outcome, the creature then becomes temporarily immune for 10 minutes. Critical Success The creature is unaffected.Success Half damage, and the creature is stunned 1.Failure Full damage, and the creature is stunned for 1 round and can't fly for 4 rounds.Critical Failure Double damage, and the creature is stunned for 2 rounds and can't fly for 1 minute.

Bestiary 3, page 80.