Multiattack. The skeleton knight makes two melee attacks.

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

Heavy Crossbow. Ranged Weapon Attack: +2 to hit, range 100/400 ft., one target. Hit: 5 (1d10) piercing damage.

Great Slash.   Once per turn, you may make a Greatsword attack against all enemies within a 10 foot cone, originating from your location.

Mighty Charge.  Once per turn, when making a Greatsword attack after moving forward in a straight line this turn, you gain 1 additional damage for every 5 ft. moved

Parry. The skeleton knight adds 2 to its AC against one melee attack that would hit it. To do so, the knight must see the attacker and be wielding a melee weapon.