From Pathfinder Howl of the Wild, which isn't enabled.

Pale Horse

CREATURE 11

UNCOMMON LARGE INCORPOREAL UNDEAD UNHOLY

The death of a unicorn in a particularly cruel manner leads to the creation of a pale horse—a symbol of hope and purity transformed into one of hopelessness and despair.

Perception +21; darkvision, lifesense (imprecise) 90 feet

Languages Common, Fey, Necril; can't speak any language

Skills Acrobatics +26, Intimidation +20, Stealth +23

Str -5, Dex +8, Con +3, Int -2, Wis +4, Cha +3

Spectral Mount

A pale horse can accept a corporeal rider, but such a rider is left behind if the pale horse passes through a creature or object.

At-Will Spells

The monster can cast its at-will spells any number of times without using up spell slots.

AC 30; Fort +20, Ref +24, Will +21

HP 180, void healing; Immunities bleed, death effects, disease, mental, paralyzed, poison, unconscious; Resistances all damage 10 (except force, ghost touch, or vitality; double resistance vs. non-magical)

Aura of Despair (aura, emotion, mental)

30 feet. A living creature that begins its turn in the aura must succeed at a DC 27 Will save or become Slowed 1. A creature is temporarily immune to the aura for 1 hour if it critically succeeds.

Void Healing

A creature with void healing draws health from void energy rather than vitality energy. It is damaged by vitality damage and is not healed by vitality healing effects. It does not take void damage, and it is healed by void effects that heal undead.

Speed fly 45 feet

Melee Spectral Horn +24 (finesse, magical), Damage 3d10+10 void

Melee Hoof +24 (agile, finesse, magical), Damage 3d8+10 void

Occult Innate Spells DC 27; 5th Toxic Cloud, Translocate; 4th Harm (×3); 2nd Darkness (At-Will)

Spectral Charge

The pale horse Flies twice and then makes a horn Strike. The pale horse can move through creatures.

Pathfinder Howl of the WildORC