Coeth Kingslayer

Magnificent Form. The coeth has advantage on saving throws against being charmed, and has advantage on all persuasion, deception, and intimidation checks against humanoids. In addition, it's weapon attacks deal an additional die of damage (included in the attack).

Thaumic Inertia. The coeth cannot be paralyzed, slowed, stopped, or moved by magical effects unless it wishes to be.

Multiattack. The coeth makes three attacks, or speaks its lordly phrase and attacks once.

Greataxe. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 18 (2d12 + 5) slashing damage.

Mace. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) bludgeoning damage.

Longbow. Ranged Weapon Attack: +8 to hit, range 5 ft. or 150/600 ft., one target. Hit: 13 (2d8+4) piercing damage.

Lordly Phrase (Recharges after a Short or Long Rest). The coeth can speak an inspiring phrase to two allies within 30 ft. For the next minute, these allies can no longer be frightened and cannot roll below a 10 on attack rolls and saving throws.

Rend the Impure (4/Day). The coeth deals 1d6 force damage to itself and imbues its next weapon attack with the power of the Miller, causing it to deal an addtional 6d8 force damage.

Parry. The coeth adds 4 to its AC against one melee attack that would hit it. To do so, the kingslayer must see the attacker and be wielding a melee weapon.