Control Undead: As an action, Undead Commander can cast the spell "Animate Dead" without expending a spell slot. He can control up to 4 undead creatures at a time, and they follow his commands.

Undead Resistance: Undead Commander has resistance to necrotic damage and is immune to being poisoned, frightened, or paralysed.

Commanding Presence: Undead Commander has advantage on all Charisma checks made against undead creatures.

Multiattack: King can make two attacks with his longsword.

Longsword: Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 1d8+2 slashing damage.

Inflict Wounds: Undead Commander can cast the spell "Inflict Wounds" as an action. The target must make a DC 14 Constitution saving throw, taking 3d10 necrotic damage on a failed save, or half as much on a successful one.

Raise Dead: As an action, Undead Commander can cast the spell "Raise Dead" without expending a spell slot. He can target a dead creature within 60 feet and bring it back to life, as long as it has been dead for no longer than 10 days.

Necrotic Touch (Bonus Action): The Undead Commander can imbue his weapon or unarmed strikes with necrotic energy, causing an additional 1d6 necrotic damage on a successful hit. He can use this ability once per turn as a bonus action, provided that he has a free hand to touch his weapon or make an unarmed strike.