Ashterron

Devil’s Sight. Magical darkness doesn’t impede the devil’s darkvision.

Aura of Blood Lust. When any other creature starts its turn within 30 feet of Ashterron, that creature must succeed on a DC 17 Wisdom saving throw, or it must immediately take the Attack action, making one melee attack against a random creature within reach. If no creatures are within reach, it makes a ranged attack against a random creature within range, throwing its weapon if necessary.

Feed on the Crowd. Whenever a creature within 60 feet of Ashterron dies, Ashterron gains 15 temporary hit points and has advantage on all attack rolls, ability checks, and saving throws until the end of its next turn.

Innate Spellcasting. Ashterron,s innate spellcasting ability is Charisma (spell save DC 17). Ashterron can innately cast the following spells, requiring no material components:

At will: charm person (as a 3rd-level spell), crown of madness

1/day: dominate person

Magic Resistance. Ashterron has advantage on saving throws against spells and other magical effects.

Multiattack. Ashterron makes three melee attacks

Damned General Greatsword. Melee Weapon Attack: +7 to hit, reach 10 ft., 1 target. Hit: 15 (2d6 + 8) [slashing] damage plus 3 (1d6) fire damage.

Flames of Treachery (recharge 5-6). Area attack: +6 to hit, 10 ft. area. Hit: 22 (5d8) fire damage. Must succeed on a DC 17 Wisdom saving throw or be frightened until Ashterron next turn.

Throw. The devil throw a grappled enemy. Ranged Attack: 30 ft. The target has to make a DC 17 Dexterity saving throw or both suffer 15 (2d8+6) bludgeoning damage and are prone. If he saves the thrown one is prone.

Warmaster Fist. When an enemy miss with a melee attack, Ashterron can grab him. Make a DC 17 Strength saving throw or suffer 11 (1d8+6) bludgeoning damage and is grappled

Ashterron has 3 legendary actions.

Chain of damnation (Costs 2 Actions). DC 17 wisdom saing throw. Chains of green flames envelop a creature like the spell Hold Monster.

Warmaster grip (Costs 1 Action). Melee attack: +6 to hit, range 10 ft., 1 target. Hit: 11 1d8+6 bludgeoning Damage and the target is grappled.