Dullahan

Medium Undead

HD:  8d12+16 (48 hp)

Initiative:  +3 (Dex)
Speed:  30 ft. (On foot)
AC:  19 (+3 Dex, +3 Natural, +3 Jet-Black studded leather of gruesome origin)
Attacks:  Human spine +8 (HD X 1/2 bonus) +4
Damage: 2d4+4 (x2 critical)
Face/Reach:  5ft. by 5ft./5ft
Special Attacks:  Frightful Presence, Turn Resistance +2, Basin of Blood (see below), Spell-like abilities
Special Qualities: SR 15, Undead, Unnatural Aura, Damage Reduction 10 / +1, Innate Deathwatch 
Saves:  Ref +6, For +2, Will +8
Abilities:  Str 18, Dex 16, Con -, Int 10, Wis 17, Cha 16
Skills:  Listen 10, Move Silently 10, Ride 10, Scry 8, Search 8, Spot 10
Feats:  Mounted Combat, Spirited Charge, Ride-By Attack 
Climate/Terrain:  Any
Organization:  Solitary
Challenge Rating:  7 (and higher)
Treasure: None
Alignment:  Chaotic Evil
Advancement:  8-14 HD

Description

The Dullahan carries it's head with him, either on the saddle-brow of his horse or in hand. The head is the colour and texture of melted wax, and quite smooth. The ghastly visage always sports an eerie grin from ear to ear, and the beady eye are continuously flicking about like hungry flies. In his other hand, he wields a human spine as gruesome weapon. The dullahan is usually mounted on a fierce warhorse which is jet black from mane to tail. The horse sends out sparks and flames from its nostrils as it charges forth. 

Around midnight on festivals or feast days is when this black-clad horsemancan be seen. In some cases the Dullahan drives a black coach or chariot (referred to as a coiste bodhar, meaning 'deaf or silent coach'). This is drawn by six black horses. As it travels it often sets on fire the bushes along the road. All gates fly open to let rider and coach through, no matter how firmly they are locked, so no one is truly safe from the attentions of this undead beast, often mistaken for a malignant faye. This horrible monster is a harbinger of death and wherever the Dullahan stops, someone dies.

Combat

Death is the only thing that can satisfy a Dullahan. Often they will detect a dying mortal from a great distance using their extraordinary vision and innate Deathwatch. They will pursue the death of that mortal with singleminded purpose. Their steeds share their Move Silently skill, even when at a full gallop and therefore, they are apt to surprise their victims before they are truly aware. A fell blow delivered by a ghostly quiet ride-by attack is a favored tactic among these hideous creatures. 

In combat, the Dullahan can also sling a basin of blood at foes which it carries on its saddle. The blood is slung across an area in a pattern very similar to that of a Burning Hands spell (PHB p. 181). Any struck by it must make a Reflex save at DC 15 or be Blinded, suffering the same effects of the spell of the same name. The basin refills itself every 2 rounds.

Spell-like abilities

Knock as an 8th level Sorcerer at will, Death Knell 3x per day as an 8th level Sorcerer

Qualities

Innate Deathwatch (Su) As per spell except no range--anything it can see.

Keen Vision (Ex) Low-light vision and 120 foot Darkvision

Extraordinary Sight (Su) The Dullahan is possessed of supernatural sight. By holding his severed head aloft, and concentrating (a standard action), he can see for great distances. The penalty to a Dullahan's spot checks during this is only -1 for every 30 feet for distance. The Dullahan's darkvision also extends to the total range of sight while the Dullahan continues to concentrate.

Other

The Dullahan's mount varies per HD of the Dullahan itself. 

Dullahan HD Mount   HD Armor Str Int Mount Special Qualities (similar to Paladin)
8 HD Light Warhorse +2 +4 +1 6 Improved Evasion
9 HD Heavy Warhorse +3 +5 +2 7 Share Saves
10 HD Heavy Warhorse +4 +6 +3 8 Spell Resistance, Mounted or Chariot
11 HD Nightmare 6 HD - - -
12 HD Nightmare  7 HD - - -
13 HD  Nightmare  8 HD - - -
14 HD Nightmare  9 HD - - - Mpunted or Flying Chariot

Rumors persist of Dullahan's driving heavy carriages across the countryside pulled by teams of horses, or even Nightmares, though these rumors have yet to be confirmed. Presumably any who have actually seen such a sight rarely live to tell the tale.