Wyrmlord Hravek Kharn

Legendary Resistance (1 per day). If Kharn fails a saving throw, he can choose to succeed instead.

Spellcasting. Kharn is a 10th-level spellcaster. His spellcasting ability is Charisma (spell save DC 16, +8 to hit with spell attacks). He has the following paladin spells prepared:

1st level (4 slots): command, hellish rebuke, shield of faith, thunderous smite

2nd level (3 slots): branding smite, crown of madness, darkness, find steed

3rd level (2 slots): blinding smite, dispel magic, fear, revivify

Aura of Protection. Whenever you or a friendly creature within 10 feet of you must make a saving throw, the creature gains a +4 bonus to the saving throw.

Aura of Courage. You and friendly creatures within 10 feet of you can’t be frightened while you are conscious.

Aura of Conquest. You constantly emanate a menacing aura while you’re not incapacitated. The aura extends 10 feet from you in every direction, but not through total cover. If a creature is frightened of you, its speed is reduced to 0 while in the aura, and that creature takes psychic damage equal to half your paladin level if it starts its turn there.

Conquering Presence (recharges on a short or long rest). You can use your Channel Divinity to exude a terrifying presence. As an action, you force each creature of your choice that you can see within 30 feet of you to make a Wisdom saving throw. On a failed save, a creature becomes frightened of you for 1 minute. The frightened creature can repeat this saving throw at the end of each of its turns, ending the effect on itself on a success.

Divine Smite. When you a creature with a melee weapon Attack, you can expend one spell slot to deal radiant damage to the target, in addition to the weapon's damage. The extra damage is 9 (2d8) for a 1st-level spell slot, plus 4 (1d8) for each Spell Level higher than 1st, to a maximum of 18 (4d8) at 3rd level. The damage increases by 4 (1d8) if the target is an undead or a fiend.

Leadership (Recharges after a Short or Long Rest). For 1 minute, the hobgoblin can utter a special command or warning whenever a non-hostile creature that it can see within 30 feet of it makes an attack roll or a saving throw. The creature can add a d4 to its roll provided it can hear and understand the hobgoblin. A creature can benefit from only one Leadership die at a time. This effect ends if the hobgoblin is incapacitated.

Martial Advantage. Once per turn, the hobgoblin can deal an extra 10 (3d6) damage to a creature it hits with a weapon attack if that creature is within 5 ft. of an ally of the hobgoblin that isn't incapacitated.

Multiattack. Kharn makes two attacks with his greatsword or shortbow.

Shortbow. Ranged Weapon Attack: +3 to hit, range 80/320 ft., one target. Hit: 5 (1d6 + 2) piercing damage.

Greatsword. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 12 (2d6 + 5) slashing damage, plus wounding (see below), plus potential 'smite' and 'martial advantage' damage. 

Note on Divine Smites: generally speaking, Kharn won't need his 2nd level spells in combat, so the first 3 hits should be coupled with 13 (3d8) radiant damage divine smites. Depending on how you play him after that or before combat, the next 4 additional hits can potentially add '1st level' 9 (2d8) smite damage. This still leaves the 3rd level slots for control or reviving fallen allies.

Wyrmlord Kharn can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. He regains spent legendary actions at the start of his turn.

Hellish Rebuke. General Kharn can cast hellish rebuke as a reaction to being hit by any kind of attack. This does not consume a spell slot.