Xarcius

Elemental Adept. Xarcius' spells ignore resistance to fire damage and when he rolls damage for a spell he casts that deals fire damage, he can treat any 1 on a damage die as a 2.

Ferocious Surge (Recharges after a Short or Long Rest). When Xarcius hits with an attack that isn’t a critical hit, he can turn the hit into a critical hit.

Innate Spellcasting. Xarcius' innate spellcasting ability is Charisma. He can innately cast the following spells (spell save DC 19), requiring no material components:

At will: alter self, invisibility

1/day each: investiture of flame, maddening darkness, plane shift, power word kill

Infernal Tactics. Xarcius has a keen eye for seizing a tactical advantage. Immediately after rolling initiative, he can choose himself and up to three allies he can see if he isn’t incapacitated. Xarcius can swap the initiative results of the chosen creatures among them.

Spellcasting. Xarcius is a 19th-level spellcaster. His spellcasting ability is Charisma (spell save DC 19, +11 to hit with spell attacks). He regains his expended spell slots when he finishes a short or long rest. Xarcius knows the following warlock spells:

Cantrips (at will): create bonfire, eldritch blast (4 beams, +4 to damage rolls for each beam), mage hand, prestidigitation

1st–5th level (4 5th-level slots): banishment, blight, blindness/deafness, burning hands, darkness, fireball, fire shield, hellish rebuke, hold person, hold monster, infernal calling, magic circle, scorching ray, scrying, wall of fire

Devil's Sight. Magical darkness doesn't impede Xarcius' darkvision.

Dark One's Blessing. When Xarcius reduces a hostile creature to 0 hit points, he gains 23 temporary hit points.

Dark One’s Own Luck (Recharges after a Short or Long Rest). When Xarcius makes an ability check or saving throw, he can add a d10 to the roll. He can do this after the roll is made but before any of the roll’s effects occur.

Eldritch Smite. Once per turn when Xarcius hits a creature with his greatsword, he can expend a warlock spell slot to deal an extra 6d8 force damage to the target and knock it prone if it is Huge or smaller.

Hurl Through Hell (1/Day). When Xarcius hits a creature with an attack, he can instantly transport the target through the lower planes. The creature disappears and hurtles through a nightmare landscape.

At the end of Xarcius' next turn, the target returns to the space it previously occupied, or the nearest unoccupied space. If the target is not a fiend, it takes 55 (10d10) psychic damage as it reels from its horrific experience.

Multiattack. Xarcius makes two attacks with his greatsword

+1 Greatsword. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage, plus 10 (3d6) fire damage, and plus 4 necrotic damage.

Parry. Xarcius adds 6 to his AC against one melee attack that would hit him. To do so, Xarcius must see the attacker and be wielding a melee weapon.