Chief Gruggic Duskhelm, Kingslayer

Divine Sense. As an action, Gruggic can detect good and evil. Until the end of his next turn, he can sense anything affected by the hallow spell or know the location of any celestial, fiend, undead within 60 ft. that is not behind total cover. He can use this feature 5 times per long rest.

Lay on Hands. Gruggic has a pool of healing power that can restore 60 HP per long rest. As an action, he can touch a creature to restore any number of HP remaining in the pool, or 5 HP to either cure a disease or neutralize a poison affecting the creature.

Great Weapon Fighting. Gruggic can reroll a 1 or 2 on damage dice with melee weapons wielded with two hands.

Spellcasting. Gruggic is a 12th-level paladin spellcaster. Its spellcasting ability is Charisma (spell save DC 16, +8 to hit with spell attacks). Gruggic has following paladin spells prepared:
1st level (4 slots): Bane, Command, Compelled Duel, Cure Wounds, Divine Favor, Hunter's Mark, Searing Smite, Shield of Faith
2nd level (3 slots): Branding Smite, Find Steed, Hold Person, Misty Step
3rd level (3 slots): Blinding Smite, Crusader's Mantle, Haste, Protection from Energy

Divine Smite. When Gruggic hits with a melee weapon attack, he can expend one spell slot to deal 2d8 extra radiant damage to the target plus 1d8 for each spell level higher than 1st (max 5d8) and plus 1d8 against undead or fiends (max 6d8 total).

Aura of Protection. While Gruggic is conscious, he grants all friendly creatures (including himself) within 10 ft. a +4 bonus to all saving throws (not included in his statblock).

Relentless Avenger. When Gruggic hits a creature with an opportunity attack, he can move up to half his speed immediately after the attack and as part of the same reaction without provoking opportunity attacks.

Aura of Courage. While Gruggic is conscious, he and all friendly creatures within 10 ft. can't be frightened.

Dwarven Resilience. Gruggic has advantage on saves against poison.

Alert. Gruggic can't be surprised while he is conscious, and other creatures don’t gain advantage on attack rolls against him as a result of being unseen by him.

Polearm Master. When Gruggic takes the Attack action, he can use a bonus action to make a melee attack with the opposite end of the weapon that uses the same ability modifier as the primary attack and has a damage die of d4 (bludgeoning). Other creatures provoke an opportunity attack from him when they enter his reach.

Sentinel. When Gruggic hits a creature with an opportunity attack, the creature's speed becomes 0 for the rest of the turn. Creatures provoke opportunity attacks from him even if they take the Disengage action. When a creature within 5 ft. of him makes an attack against a target other than himself, he can use his reaction to make a melee weapon attack against the attacking creature.

Multiattack. Gruggic makes two attacks with his pike.

Pike. Melee Weapon Attack: +11 to hit, reach 10 ft., single target. Hit: 13 (1d10 + 7) piercing damage plus 5 (1d8) necrotic damage.