Armor Class 20 ({@item plate armor|phb}, {@item shield|phb})
Hit Points 60 (8d8 + 24)
Speed 30 ft., fly 30 ft.
Skills Perception +4
Damage Resistances [object Object]
Damage Immunities force, necrotic, poison
Condition Immunities blinded, charmed, deafened, frightened, paralyzed, petrified, poisoned, stunned
Senses blindsight 60 ft. (blind beyond this radius), passive Perception 14
Languages understands the languages of its creator but can't speak
Challenge 4
Magic Resistance. The helmed horror has advantage on saving throws against spells and other magical effects.
Spell Immunity. The helmed horror is immune to three spells chosen by its creator. Typical immunities include fireball, heat metal, and lightning bolt.
Multiattack. The helmed horror makes two longsword attacks.
Longsword. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage, or 9 (1d10 + 4) slashing damage if used with two hands.
Monster Manual (2014), p. 183