Devil's Sight. Magical darkness doesn't impede the war devil's darkvision.
Fear Aura. Any hostile creature that starts its turn within 20 feet of the war devil must succeed on a DC 18 Wisdom saving throw or have the frightened condition until the start of the creature's next turn. If a creature's saving throw is successful, the creature is immune to the war devil's Fear Aura for the next 24 hours. This ability doesn't function if the war devil is unconscious.
Magic Resistance. The war devil has advantage on saving throws against spells and other magical effects.
Multiattack. The war devil makes two attacks using its Cold- Iron Ranseur, Claws, or a combination of the two.
Cold-Iron Ranseur. Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit:23 (3d10 + 7) force damage plus 14 (4d6) cold damage.
Claws. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit:20 (3d8 + 7) slashing damage. If the target is a Large or smaller creature, it has the grappled condition (escape DC 20). While a creature is grappled, the war devil can't make Claws attacks.
Created through the sacrifice of other devils, both alive and dead, war devils vary in size and shape, but not personality. They crave combat and are highly aggressive, often commanding legions of lesser devils in wars. While they greatly enjoy bullying weaker creatures and exerting their dominance, they're highly submissive towards more powerful creatures and higher ranked devils.