uncommon ce huge acid amphibious dragon 

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

Languages Common, Draconic, Goblin, Jotun, Orcish

Skills Acrobatics +25, Arcana +26, Athletics +32, Deception +29, Intimidation +29, Stealth +27

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

AC  39; Fort +30, Ref +27, Will +29; +1 status to all saves vs. magic

HP 325; Immunities acid, paralyzed, sleep

Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 35

Tail Lash [R] Trigger A creature within reach of the dragon's tail takes an action to Strike or attempt a skill check; Effect The dragon Strikes with its tail at the triggering creature at a –2 penalty. If it hits, the creature takes a –2 circumstance penalty to the triggering roll.

Speed 60 feet, fly 150 feet, swim 60 feet

Melee [>] jaws +33 (acid, magical, reach 15 feet), Damage 3d10+14 piercing plus 2d6 acid and 2d6 persistent acid

Melee [>] claw +33 (agile, magical, reach 10 feet), Damage 3d8+14 slashing

Melee [>] tail +31 (magical, reach 20 feet), Damage 3d10+12 bludgeoning

Melee [>] horns +31 (magical, reach 15 feet), Damage 2d10+12 piercing

Arcane Innate Spells DC 37; 2nd darkness (at will)

Breath Weapon [>>] (acid, arcane, evocation) The dragon breathes a spray of acid that deals 17d6 acid damage in a 100-foot line (DC 39 basic Reflex save). It can't use Breath Weapon again for 1d4 rounds.

Corrupt Water [>] (arcane, concentrate, necromancy) Frequency once per day; Effect The dragon permanently befouls 10 cubic feet of liquid within 90 feet. The liquid becomes undrinkable and unable to support water-breathing life. This destroys liquid magic or alchemical items if they're of a lower level than the dragon (a creature can attempt a DC 35 Will save to protect liquids in its possession). This doesn't affect the liquids in a creature's body.

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

Draconic Momentum The dragon recharges its Breath Weapon whenever it scores a critical hit with a Strike.

Bestiary, page 106.