uncommon ng huge dragon earth elemental 

Perception +20; darkvision, scent (imprecise) 60 feet, tremorsense (imprecise) 30 feet

Languages Common, Draconic, Terran, Undercommon

Skills Acrobatics +19, Athletics +24, Deception +22, Intimidation +22, Nature +19, Stealth +21, Survival +20

Str +7 Dex +2 Con +5 Int +2 Wis +3 Cha +5

AC  33; Fort +24, Ref +19, Will +20

HP 185; Immunities paralyzed, sleep; Weaknesses sonic 10

Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 30

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 50 feet, burrow 35 feet, fly 120 feet

Melee [>] jaws +24 (sonic, reach 15 feet), Damage 2d8+13 slashing plus 3d6 piercing

Melee [>] claw +24 (agile, magical, reach 10 feet), Damage 2d8+13 slashing

Melee [>] tail +22 (magical, reach 20 feet), Damage 1d10+13 slashing

Primal Innate Spells DC 30; 3rd color spray (×3), glitterdust, hypnotic pattern

Breath Weapon [>>] (evocation, primal) The dragon breathes a flurry of piercing crystals that deal 12d6 piercing damage in a 40-foot cone (DC 30 basic Reflex save). They can't use Breath Weapon again for 1d4 rounds.

Crystallize Flesh [F] (primal, transmutation) Frequency once per day; Trigger The crystal dragon damages a creature made of flesh with a jaws Strike; Effect The dragon embeds transformative crystals in the creature's flesh. The creature must attempt a DC 30 Fortitude save. Critical Success The target is unaffected.Success The target is slowed 1 for 1 round as portions of its flesh turn crystalline.Failure The target is slowed 1 and must attempt a Fortitude save at the end of each of its turns; this ongoing save has the incapacitation trait. On a failed save, the slowed condition value increases by 1 (or by 2 on a critical failure). A successful save reduces the slowed condition value by 1. A creature unable to act due to the slowed condition from Crystallize Flesh is petrified permanently, transforming into a crystalline statue. The effect ends if the creature is petrified or the slowed condition is removed.Critical Failure As failure, but the target is initially slowed 2.

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 92.