Uulneval, Spawn of Ilneval

Hellish Weapons. Uulneval's weapon attacks are magical and deal an extra 13 (3d8) poison damage on a hit (included in the attacks).

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

Aggressive. As a bonus action, Uulneval can move up to its speed toward a hostile creature that it can see.

Foe Smiter of Ilneval. Uulneval deals an extra die of slashing damage when they hit with a longsword attack (included in the attack).

Uulneval's Endurance. Once per day, when Uulneval is reduced to 0 hit points, the sheer malice of their nature will embue them with additional life force, restoring half of their maximum hit points, but they no longer have access to their legendary actions or resistances.

Multiattack. The erinyes makes three attacks.

Longsword. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage, or 15 (2d10 + 4) slashing damage if used with two hands, plus 13 (3d8) poison damage.

Longbow. Ranged Weapon Attack: +7 to hit, range 150/600 ft., one target. Hit: 7 (1d8 + 3) piercing damage plus 13 (3d8) poison damage, and the target must succeed on a DC 14 Constitution saving throw or be poisoned. The poison lasts until it is removed by the lesser restoration spell or similar magic.

Ilneval’s Command (Recharge 4–6). Up to three allied orcs, orogs, or tanarukks within 120 feet of Uulneval that can hear them can use their reactions to each make one weapon attack.

Parry. Uulneval adds 4 to its AC against one melee attack that would hit them. To do so, they must see the attacker and be wielding a melee weapon.

Legendary Resistance.  3 times per day, when Uulneval fails a saving throw, they may choose to succeed, instead.

Uulneval may use 3 legendary actions per combat round.

Commander's Move. Uulneval may move up to their speed, provided that they end the movement within 5 feet of an ally.

Longsword. Uulneval may make one attack with their longsword.

Frenzy of the Commander (2 actions). Uulneval bellows a battlecry, and makes three attacks with its longsword against an enemy within 5 feet. All allies within 30 feet who can see Uulneval make attacks and saving throws with advantage until the end of Uulneval's next turn.