Here you go:
The Harbinger, CR 17
N Huge Construct
Init 4, Senses Darkvision 120ft, Blindsense 60ft;
Defense
AC 35/36 (Flying), touch 12, flat-footed 31 (-2 size, +4 Dexterity, +23 natural) + 1 (Dodge, Flying)
HP 188 (24d10+40)
Fort +8, Ref +12 (+1 while flying), Will +11
DR 15/Valyrian Steel, Fast Healing 10 (may reattach bodyparts)
Immune: construct traits, magic
Spell-Like Abilities (CL 15th)
Constant - Fire Eyes, Aerial Alacrity, Tongues
At will - Voice of the Dragon (DC 18), Elemental Darts (Fire only) (DC 16), Firebrand (DC 19), Greater Thunderstomp, Arcane Sight
3/day - Blinding Breath, Greater Dispel Magic
Offense:
Speed 40 ft., fly 230ft. (normal)
BAB/Grapple: +18/+36
Melee: Bite +28/+28/+28 (2d8 + 1d6 (Fire) + 10), Wings +26/+26 (1d8 + 1d6 (Fire) +5), Tail Slap +26 (2d6 + 1d6 (Fire) + 10)
Space 15 ft.; Reach 10 ft.; 15ft. with bites
Special Attacks: 3 breath weapons (50-ft cone, DC 26 Reflex, 10d10 fire, each usable every 1d4 rounds); Inferno.
Statistics:
Str 30, Dex 18, Con -, Int 16, Wis 16, Cha 18
BAB/Grapple: +18/+36
Feats: Cleave, Multiattack, Fly-By Attack, Power Attack, Fly-By Breath, Quicken SLA (Fire Darts), Strafing Breath (B), Hover (B)
Skills: Bluf +19, Diplomacy +45, Intimidate +43, Knowledge (Arcana) +18, Knowledge (Dungeoneering) +16, Knowledge (Geography) +15, Knowledge (History) +15, Knowledge (Law) +30, Knowledge (Local) +15, Knowledge (Nature) +16, Knowledge (Nobility) +15, Knowledge (Religion) +18, Knowledge (Planes) +18, Spellcraft +20
Skill ranks: Diplomacy 27, Bluff 5, Intimidate 27, Sense Motive 27, Knowledge (Arcana) 5, Knowledge (Dungeoneering) 3, Knowledge (Geography) 2, Knowledge (History) 2, Knowledge (Local) 2, Knowledge (Nature) 3, Knowledge (Nobility) 2, Knowledge (Religion) 5, Knowledge (Planes) 5, Knowledge (Law) 15, Spellcraft 5
Racial: +12 in Knowledge (Law)
Synergy: +4 Diplomacy from Bluff and Sense Motive, +2 Intimidate from Bluff, +2 Spellcraft from Arcana
Magic: +10 Enhancement on Diplomacy, Bluff, Intimidate, all default Knowledges and Spellcraft.
Languages:
Tongues
Special Abilities:
Frightful Presence (Ex): The ability takes effect automatically whenever the Harbinger attacks,
charges, or flies overhead. Creatures within a radius of 180 ft are subject to the effect if they have fewer than 24
HD. A potentially affected creature that succeeds on a
Will save (
DC 26) remains immune to the Harbinger's
frightful presence for 24 hours. On a failure, creatures with 4 or less
HD become
panicked for 4d6 rounds and those with 5 or more
HD become
shaken for 4d6 rounds. Dragons ignore the
frightful presence of the Harbinger.
Immunity to Magic (Ex): The Harbinger is immune to spells or spell-like abilities that allow spell resistance, except his own spell-like abilities. Certain spells and effects function differently against it, as noted below.
A magical attack that deals cold damage slows the Harbinger down as the Slow spell for 3 rounds without a save.
A magical attack that deals fire damage breaks any slow effect on the Harbinger and heals 1 point of damage for each 3 points of damage the attack would otherwise deal. If the amount of healing would cause the Harbinger to exceed its full normal hit points, it gains any excess as temporary hit points. A Harbinger gets no saving throw against fire effects. The Harbinger may heal itself with its own SLAs and Breath Weapon.
Fire Aura (Ex): The Harbinger is surrounded by an aura of intense heat. All creatures that strike the Harbinger take 1d6 points of fire damage each time they do so, unless they use a Reach weapon. If they do so with manufactured weapons, the weapons also take damage. Furthermore, all of the Harbinger's natural attacks deal an additional 1d6 Fire damage. This effect can be turned on and off as a free action.
Three Heads (Ex): May attack with all three bites at the end of a charge.
Wildfyre (Su): All Fire damaged dealt by the Harbinger is considered to have the Searing Property. Furthermore, once per day, he can add the effects of the Fire Mastery feat to any one attack that deals Fire damage.
Programmed Lore (Ex): The Harbinger my Take 10 on a Knowledge or Spellcraft check as long as it has ten uninterrupted minutes to go through its memory archives, and the DC of the check is no higher than 30.
Inferno (Su): Three times per day as a Full Round action, the three heads of the Harbinger can combine their breath weapons for a devastating attack. This ability affects a 70ft cone and deals 18d10 fire damage, DC 28 Reflex save for half. He cannot use his breath weapons for 3d4 rounds after using this ability.
Improved Grab (Ex): To use this ability, the Harbinger must hit with a bite attack. It can then attempt to start a grapple as a free action without provoking an attack of opportunity.
Cost: 15500 lbs of Valyrian Steel, Wildfyre Orb, 40000 IM in enchanting materials.
