Commander Rook

Mounted Supremacy. When Commander Rook is mounted add +2 to his damage rolls

Multiattack. Commander Rook makes two battleaxe attacks

Battle Axe. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d8 + 1) slashing damage, or 6 (1d10 + 1) slashing damage if used with two hands.

Javelin. Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 30/120 ft., one target. Hit: 5 (1d6 + 2) piercing damage.

Call Mount. As a bonus action Commander Rook can summon his mount if it's within 30ft of him. The mount spends a reaction to move as close as possible to Commander Rook. Movement does not provoke attack of opportunity when it move in this way. 

The Steed Over the Rider. When Commander Rook is mounted and is targeted with an attack, he can spend his reaction to change the target from him to his mount.