Underworld Dragon, Ancient

This serpentine dragon has skin the color of deep volcanic rock, enormous claws, and jagged, stonelike horns and scales.

Underworld Dragon, Ancient (CR 16)

Huge Dragon (Fire)
Alignment: Lawful Evil
Initiative: +3
Senses: Dragon Senses, smoke vision; Perception +30
Aura: frightful presence (300 feet, DC 26)

Speed: 40 feet, Burrow 60 feet, Fly 200 feet (poor)
Space: 15 feet

Defense

Armor Class: 39, touch 7, flat-footed 39 (-1 Dex, +32 natural, -2 size)
Hit Points: 297 (22d12+154)
Saving Throws: Fort +20, Ref +12, Will +18
Damage Reduction: 15/magic
Immunity: fire, paralysis, sleep
Spell Resistance: 27
Weaknesses: vulnerability to cold

Offense

Melee: bite +33 (2d8+18), 2 claws +33 (2d6+12/19-20), gore +32 (2d6+18), tail slap +27 (2d6+18)
Reach: 10 feet (15 feet with bite)

Special Attacks: adamantine claws, Breath Weapon (100-ft. line, 20d6 fire damage, DC 28), crush (DC 28, 2d8+12)

Spell-Like Abilities (CL 22nd; Concentration +27):

• At Will- Repel Metal or Stone, Soften Earth and Stone, Spike Stones (DC 19), Stone Shape, Wall Of Stone

Spells Known (CL 11th; Concentration +15):

• 5th (4/day) - Teleport, Wall Of Force
  
  
• 4th (7/day) - Fire Shield, Invisibility, Greater, Stoneskin
  
  
• 3rd (7/day) - Dispel Magic, Displacement, Haste, Tongues
  
  
• 2nd (7/day) - Alter Self, Detect Thoughts, Misdirection, Resist Energy, See Invisibility
  
  
• 1st (7/day) - Alarm, Grease (DC 15), Magic Missile, Shield, True Strike
  
  
• 0 (at will) - Arcane Mark, Bleed, Light, magehand, Mending, Message, Open/Close, Prestidigitation, Read Magic

Statistics

Str	Dex	Con	Int	Wis	Cha
35 (+12)	8 (-1)	25 (+7)	20 (+5)	21 (+5)	20 (+5)

Base Attack Bonus: +22
CMB +36 (+38 Bull Rush)
CMD 45 (47 vs. Bull Rush, 49 vs. Trip)

Feats: Critical Focus, Powerful Maneuvers, Improved Critical (bite), Improved Critical (claw), Improved Initiative, Improved Natural Armor, Lunge, Skill Focus (Stealth), Weapon Focus (bite), Weapon Focus (claw)

Skills: Acrobatics +21 (+25 when jumping), Appraise +30, Bluff +30, Climb +37, Fly +16, Intimidate +30, Knowledge (dungeoneering) +30, Knowledge (geography) +30, Knowledge (planes) +30, Perception +30, Stealth +22

Languages: Common, Draconic, Dwarven, Giant, Ignan, Terran

Special Qualities: Change Shape, underworld burrower

Special Abilities

Adamantine Claws (Ex)

The claws of an underworld dragon are made of adamantine, and have the qualities of a weapon made from that material.

Change Shape (Su)

A young or older underworld dragon can assume any humanoid form three times per day as if using polymorph.

Lava Eruption (Su)

As a full-round action, a great wyrm underworld dragon can burrow through the ground up to twice its burrow speed. At the end of that movement, if the underworld dragon has use of its breath weapon, it can emerge from the ground spouting lava in a 30-foot-radius burst, dealing damage as the breath weapon.

Smoke Vision (Ex)

A very young and older underworld dragon can see perfectly in smoky conditions (such as those created by pyrotechnics).

Underworld Burrower (Ex)

An adult underworld dragon gains a 10-foot bonus to its burrow speed. When the underworld dragon becomes old and every two age categories thereafter, its burrow speed increases by an additional 10 feet.

Ecology

Environment: Any Underground
Organization: solitary
Treasure: triple


Underworld dragons-also called futsanglungs-are calculating, greedy creatures that carve great labyrinthine tunnels beneath the world, defending their hidden treasures.

Preferring the earth to the heavens, they channel the fires of the world's core within their twisting, stonelike bodies and through flaming breath hot enough to turn granite into slag.