When a Destroyer Demon possesses the body of a Knight, it transforms it into a Knight of Hell, its armor blackens, fire licks from the edge of its body and its eyes become burning, fiery orbs. A nearby horse will also be possessed, becoming a Hell Horse (a maximum Hit Point 5 HD brute).
AC: 22 HD 10 HP 41
Resistance: 22; vs. magic 13
Mods: W +3/N+7/S+12
Speed: 30', 65' when mounted on a Hell Horse
Morale: +12
Stealth 0 Perception 0
Attack, Melee: +12; Damage: 3d8+2 slashing (arming sword)
Attack, Melee: +12; Damage: 3d8+2 piercing (lance, double on charge)–Reach
Attack, Melee:: +12; Damage: 3d4+2 bludgeoning or piercing (mace or dagger)
Terrible Critical: scores a critical hit on 19-20, which also inflicts the pained condition
Riding Master: advantage to all riding checks and can mount/dismount as quick action
Knightly Combat: various advantages when fighting mounted
Hellish Defense: resistant (half damage) to all non-magical weapons, arcane spells, and natural weapons
Immune: fire and cold
Terrifying Aspect: all human NPC's must make a morale check when encounter begins
Hell's Command: the Knight of Hell can give orders to any Imp, Pit Spawn, or Undead of fewer HD than it has.
S+12 D+12, C+7, I+7, W+7,Ch+7