Ghost Knight Templar 2014
CR 10 undead
Medium undead, lawful evil
If mounted and it moves 20'+ straight to foe and hits with shadow blade on same turn target takes an extra 10 (3d6) slashing damage.
Move through others/objects as difficult terrain. Takes 5 (1d10) force if it ends turn in object.
It and all ghouls within 30' of it: advantage on saves vs. turn undead.
Doesn't require air food drink or sleep.
Bonus Actions
Can summon or dismiss a ghostly mount mounting or dismounting it as part of this bonus action with o spending movement. Mount uses the stats of a warhorse skeleton except it has the Incorporeal Movement trait a flying speed of 60 feet 40 hp and resistance to cold and necrotic and B/P/S damage from nonmagical attacks. If mount is slain it disappears leaving behind no physical form and templar must wait 1 hr before summoning it again.
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details