rare ng gargantuan dragon earth elemental 

Perception +28; darkvision, scent (imprecise) 60 feet, tremorsense (imprecise) 60 feet

Languages Celestial, Common, Draconic, Terran, Undercommon

Skills Acrobatics +22, Athletics +33, Deception +29, Intimidation +29, Nature +27, Stealth +28, Survival +26

Str +9 Dex +5 Con +6 Int +5 Wis +5 Cha +7

AC  42; Fort +30, Ref +27, Will +29

HP 275; Immunities paralyzed, sleep; Weaknesses sonic 15

Extra Reaction The dragon gains 2 reactions at the start of each of their turns.

Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 37

Scintillating Aura (aura, evocation, incapacitation, primal, visual) 30 feet. A swirling vortex of reflected color and light shimmers around the crystal dragon. Creatures in this aura's emanation are dazzled. Each creature that ends its turn in the emanation must succeed at a DC 34 Will saving throw or be stunned 1 (or stunned 3 on a critical failure). Once a creature succeeds at this save, it is temporarily immune to the stunning effect for 1 minute. The crystal dragon can turn this aura on or off using a single action, which has the concentrate trait, and it can choose not to affect allies.

Reflect Spell [R] Trigger The crystal dragon is targeted by a ranged spell attack roll; Effect The crystal dragon adjusts a wing to try to reflect the spell and gains a +4 circumstance bonus to AC against the triggering attack. If the attack misses, the spell is reflected back at the caster, who must roll a second ranged spell attack roll against their own AC to determine if the spell hits them instead.

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 60 feet, burrow 40 feet, fly 140 feet

Melee [>] jaws +33 (magical, reach 20 feet), Damage 3d8+17 slashing plus 4d6 piercing

Melee [>] claw +33 (agile, magical, reach 15 feet), Damage 3d8+17 slashing

Melee [>] tail +31 (magical, reach 25 feet), Damage 2d10+17 slashing

Primal Innate Spells DC 37; 7th prismatic spray; 5th color spray (at will), glitterdust (at will), hypnotic pattern (at will); Cantrips (7th) dancing lights

Breath Weapon [>>] (sonic, evocation, primal) The dragon breathes a flurry of piercing crystals that deals 17d6 piercing damage in a 50-foot cone (DC 38 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 37 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.