uncommon le large dragon fire 

Perception +13; darkvision, scent (imprecise) 60 feet, smoke vision

Languages Common, Draconic, Undercommon

Skills Acrobatics +11, Arcana +13, Athletics +17, Crafting +17, Deception +10, Intimidation +12, Nature +13, Stealth +13, Survival +11

Str +6 Dex +2 Con +3 Int +4 Wis +2 Cha +1

Smoke Vision Smoke doesn't impair an underworld dragon's vision; they ignore the concealed condition from smoke.

AC  25; Fort +18, Ref +13, Will +15

HP 115; Immunities fire, paralyzed, sleep

Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 23 (page 305)

Speed 40 feet, burrow 30 feet, fly 80 feet

Melee [>] jaws +18 (reach 10 feet), Damage 2d8+8 piercing plus 1d6 fire

Melee [>] claw +18 (agile), Damage 2d8+8 slashing plus adamantine claws and Grab

Melee [>] tail +18 (reach 20 feet), Damage 2d8+8 bludgeoning plus Grab

Arcane Innate Spells DC 25; 2nd continual flame; Cantrips (2nd) detect magic

Adamantine Claws The dragon's claws are infused with adamantine. Their claw Strikes ignore half the Hardness of any object hit.

Breath Weapon [>>] (arcane, evocation, fire) The dragon breathes a blast of fire that explodes in a 20-foot burst within 40 feet, dealing 7d6 fire damage (DC 25 basic Reflex save). Creatures that fail the save also take 1d6 persistent fire damage. The dragon can't use Breath Weapon again for 1d4 rounds.

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.

Constrict [>] 2d8+4 bludgeoning, DC 25

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

Bestiary 3, page 83.