uncommon ng large dragon earth elemental 

Perception +15; darkvision, scent (imprecise) 60 feet, tremorsense (imprecise) 30 feet

Languages Common, Draconic, Terran

Skills Acrobatics +14, Athletics +16, Deception +15, Intimidation +15, Nature +15, Stealth +18, Survival +15

Str +5 Dex +1 Con +3 Int +1 Wis +2 Cha +4

AC  27; Fort +16, Ref +14, Will +15

HP 105; Immunities paralyzed, sleep; Weaknesses sonic 5

Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 25

Twisting Tail [R] Trigger A creature within reach of the dragon's tail uses a move action or leaves a square during a move action it's using; Effect The dragon makes a tail Strike at the creature with a –2 penalty. If it hits, the dragon disrupts the creature's action.

Speed 40 feet, burrow 30 feet, fly 100 feet

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

Melee [>] claw +18 (agile), Damage 2d6+8 slashing

Melee [>] tail +16 (reach 15 feet), Damage 1d10+8 slashing

Primal Innate Spells DC 25; 3rd color spray; Cantrips (3rd) dancing lights

Primal Prepared Spells DC 25, attack +18; 3rd earthbind, meld into stone; 2nd faerie fire, glitterdust, shatter; 1st grease, mending, pass without trace; Cantrips (3rd) acid splash, detect magic, light, prestidigitation, telekinetic projectile

Breath Weapon [>>] (evocation, primal) The dragon breathes a flurry of piercing crystals that deal 8d6 piercing damage in a 30-foot cone (DC 25 basic Reflex save). They can't use Breath Weapon again for 1d4 rounds.

Draconic Frenzy [>>] The dragon makes two claw Strikes and one tail Strike in any order.

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

Bestiary 2, page 91.