Multiattack

The black knight commander makes two melee attacks.

Mace

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 8 (1d6 + 5) bludgeoning damage.

Lance

Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 11 (1d12 + 5) piercing damage.

Frightful Charge (Recharges after a Short or Long Rest)

The black knight commander lets loose a terrifying cry and makes one melee attack at the end of a charge. Whether the attack hits or misses, all enemies within 15 feet of the target and aware of the black knight commander's presence must succeed on a DC 13 Wisdom saving throw or become frightened for 1 minute. A frightened creature repeats the saving throw at the end of each of its turns, ending the effect on itself on a success.