Vorpal Knight

Magic Resistance. The death knight has advantage on saving throws against spells and other magical effects.

Fed up: When the vorpal knight falls below half HP, he discards his battered shield and wields his sword with two hands, suffering a

Spellcasting. The vorpal knight is a 14th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 18, +10 to hit with spell attacks). It has the following paladin spells prepared:

1st level (4 slots): command, compelled duel, searing smite

2nd level (3 slots): hold person, magic weapon

3rd level (3 slots): dispel magic, elemental weapon

4th level (1 slots): banishment, staggering smite

Multiattack. The death knight makes three longsword attacks.

Vorpal Rapier. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 11 (1d8 + 7) slashing damage, or 12 (1d10 + 7) slashing damage if used with two hands, plus 18 (4d8) cold damage.

Hellfire Orb (1/Day). The vorpal knight hurls a magical ball of fire that explodes at a point it can see within 120 feet of it. Each creature in a 20-foot-radius sphere centered on that point must make a DC 18 Dexterity saving throw. The sphere spreads around corners. A creature takes 17 (5d6) fire damage and 17 (5d6) force damage on a failed save, or half as much damage on a successful one.

Prayer of Sustain Battle (1/Day). Up to six creatures of your choice that you can see within range each regain hit points equal to [roll]4d10+10[/roll]. This spell has no effect on undead or constructs.

Parry. The vorpal knight adds 6 to its AC against one melee attack that would hit it. To do so, the vorpal knight must see the attacker and be wielding a melee weapon.