Monster Manual (5.5e)
Spellcasting. The knight casts one of the following spells, using Charisma as the spellcasting ability (spell save DC 16):
Aura of Bravery. Creatures of the knight's choice in a 30-foot Emanation originating from it have Immunity to the Charmed & Frightened conditions while there.
Multiattack. The knight makes three attacks, using Greatsword or Longbow in any combination.
Greatsword. Melee Attack Roll: +9, reach 5 ft., one target. Hit: 12 (2d6 + 5) Slashing damage plus 22 (5d8) Radiant damage.
Longbow. Ranged Attack Roll: +7, range 150/600 ft., one target. Hit: 12 (2d8 + 3) Piercing damage plus 22 (5d8) Radiant damage.
Any Climate; Any Terrain