Unseelie Unicorn* (CR 4)

Large Fey
Alignment: Always evil
Initiative: +4 (Dex); Senses: low-light vision, Listen +13, and Spot +13

AC: 19 (-1 size, +4 Dex, +6 natural), touch 13, flat-footed 15
Hit Dice: 4d6+16 (30 hp); DR: 1/iron
Fort +6, Ref +7, Will +9
Speed: 60 ft., fly 120 ft. batlike wings (average)
Space: 10 ft. by 10 ft.
Base Attack +2; Grapple +10
Attack: Horn +6 melee, 2 hooves +1 melee
Full Attack: Horn +6 melee, 2 hooves +1 melee
Damage: Horn 1d8+7, hoof 1d4+2
Special Attacks/Actions: Spell-like abilities, winters chill, wild empathy
Abilities: Str 18, Dex 19, Con 19, Int 10, Wis 21, Cha 22
Special Qualities: iron vulnerability
Feats: Alertness
Skills: Diplomacy +12, Intimidate +10, Listen +13, Move Silently +10, Spot +13, and Survival +9
Advancement: 5-8 HD (Large) or by character class
Climate/Terrain: Any land and underground
Organization: Solitary, pair, or grace (3-6)
Treasure/Possessions: Standard

Source: Dragon #304

Immunities: Unicorns are immune to all poisons and to charm and hold spells.

Iron Vulnerability (Ex): The mere touch of iron (including steel) deals 1 point of damage to an unseelie fey. A hit with an iron or steel weapon deals an additional +1d6 points of damage.

Low-Light Vision: The creature can see twice as far as a human in starlight, moonlight, torchlight, and similar low-light conditions.

Magic Circle against Evil (Su): This ability continuously duplicates the effects of the spell. The unicorn cannot suppress this ability.

Spell-like Abilities: Unicorns can detect evil at will as a free action. Once per day a unicorn can teleport without error to move anywhere within its home. It cannot teleport beyond the forest boundaries nor back from outside.

A Unicorn can use cure light wounds three times per day and cure moderate wounds once per day, as cast by a 5th-level druid, by touching a wounded creature with its horn. Once per day it can use neutralize poison, as cast by an 8th-level druid, with a touch of its horn.

Winter's Chill (Su): An unseelie fey with winter chill has a presence that disquiets non-fey. The more beautiful the creature is, the more uncomfortable other beings feel. Living, non-fey creatures within 5 feet of her feet uneasy and suffer a -6 morale penalty on saves.

Skills: *Unicorns receive a +3 competence bonus to Survival checks within the boundaries of their forest.

Unseelie unicorns are hostile and dangerous creatures. They usually attempt to trick or attack those they encounter.