Commander of Bones.

As a bonus action, the knight can target one skeleton or zombie it can see within 30 feet of it. The target must make a DC 14 Wisdom saving throw. On a failed save, the target must obey the knight's commands until the knight dies or until the knight releases it as a bonus action. The knight can command up to twelve undead at a time this way.

Master of the Pallid Banner.

While within 60 feet of the knight, any undead ally of the knight has advantage on saving throws against any effect that turns undead.

Spellcasting.

The knight is an 8th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 14, +6 to hit with spell attacks). It has the following paladin spells prepared:

1st level (4 slots): command, compelled duel, hellish rebuke, wrathful smite
2nd level (3 slots): branding smite, crown of madness, darkness, find steed, magic weapon

Actions

Multiattack.

The knight attacks twice with one of its weapons.

Greatsword.

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.

Longbow.

Ranged Weapon Attack: +4 to hit, range 150/600 ft., one target. Hit: 5 (1d8 + 1) piercing damage.

Bone Knight