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    Underworld Dragon, Ancient

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

    Ancient Underworld Dragon CR 16

    XP 76,800
    LE Huge dragon (fire)
    Init +3; Senses dragon senses, smoke vision; Perception +30
    Aura frightful presence (300 ft., DC 26)


    AC 38, touch 7, flat-footed 38 (-1 Dex, +31 natural, -2 size)
    hp 297 (22d12+154)
    Fort +20, Ref +12, Will +18
    DR 15/magic; Immune fire, paralysis, sleep; SR 27
    Weaknesses vulnerability to cold


    Speed 40 ft., burrow 50 ft., fly 200 ft. (poor)
    Melee bite +30 (2d8+12), 2 claws +29 (2d6+8/19-20), gore +29 (2d6+12), tail slap +24 (2d6+12)
    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 willrepel metal or stone, soften earth and stone, spike stones (DC 19), stone shape, wall of stone

    Spells Known (CL 13th; concentration +18)

    6th (4/day)disintegrate (DC 21), flesh to stone (DC 21)
    5th (7/day)passwall, transmute rock to mud, waves of fatigue
    4th (7/day)enervation, shout (DC 19), solid fog, stone shape
    3rd (7/day)displacement, fireball (DC 18), protection from good, rage, slow
    2nd (7/day)acid arrow, daze monster (DC 17), flaming sphere (DC 17), scorching ray
    1st (8/day)burning hands (DC 16), cause fear (DC 16) magic missile, ray of enfeeblement (DC 16), true strike
    0 (at will)acid splash, bleed (DC 15), detect magic, flare (DC 15), ghost sound, mage hand, read magic, resistance, touch of fatigue (DC 15)


    Str 35, Dex 8, Con 25, Int 20, Wis 21, Cha 20
    Base Atk +22; CMB +36; CMD 45 (49 vs. trip)
    Feats Greater Weapon Focus (claw), Improved Bull Rush, Improved Critical (bite, claw), Improved Initiative, Improved Natural Armor, Lunge, Power Attack, Skill Focus (Stealth), Weapon Focus (bite, claw)
    Skills Acrobatics +24 (+28 when jumping), Appraise +30, Bluff +30, Climb +37, Fly +16, Intimidate +30, Knowledge (dungeoneering, geography, planes) +30, Perception +30, Stealth +22
    Languages Common, Draconic, Dwarven, Giant, Ignan, Terran
    SQ change shape, underworld burrower


    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.

    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.