le large amphibious dragon 

Perception +16; darkvision, scent (imprecise) 60 feet

Languages Common, Draconic

Skills Acrobatics +13, Arcana +16, Athletics +17, Deception +14, Diplomacy +16, Intimidation +16, Nature +14, Occultism +17, Society +14, Stealth +15

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

AC  28; Fort +16, Ref +16, Will +17

HP 135; Immunities poison, paralyzed, sleep

Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 24

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 30 feet, fly 120 feet, swim 30 feet; woodland stride

Melee [>] jaws +20 (poison, reach 10 feet), Damage 2d10+8 piercing plus 2d4 poison

Melee [>] claw +20 (agile), Damage 2d8+8 slashing

Melee [>] tail +18 (reach 15 feet), Damage 2d8+7 bludgeoning

Melee [>] horn +18 (reach 10 feet), Damage 1d12+7 piercing

Arcane Innate Spells DC 26; 2nd entangle; 1st charm (×2)

Breath Weapon [>>] (arcane, evocation, poison) The dragon breathes a toxic cloud that deals 9d6 poison damage in a 40-foot cone (DC 25 basic Fortitude save). It can't use Breath Weapon again for 1d4 rounds.

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

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

Woodland Stride The green dragon ignores difficult terrain and greater difficult terrain from non-magical foliage.

Bestiary, page 109.