Wave Rider Knight (Cavalry)

Spellcasting. 

(At will)

Find Steed (Skeleton Warhorse), Water Walk

(1/per day)

Control Water, Cone of Cold (DC Save 14)

Multiattack. Wave Rider Knight makes 2 longsword attacks.

Frost Longsword. Melee Weapon Attack: +9 to hit, reach 5 ft., 1 target. Hit:  (1d10 + 5) slashing damage and (1d8) cold damage. 

Ice Javelin. Ranged Weapon Attack: +9 to hit, range 20/60 ft., 1 target. Hit:  (1d6 + 4) piercing damage and (1d8) cold damage.

Parry. The Wave Rider Knight adds 4 to its AC against one melee attack that would hit it. To do so, the Wave Rider Knight must see the attacker and be wielding a melee weapon.

Legendary Actions

The Wave Rider Knight takes 1 legendary action. Only one legendary action can be used at a time and only at the end of another creatures turn. The Wave Rider Knight regains spent legendary actions at the start of its turn.

Longsword Attack: The Wave Rider Knight makes a Frost Longsword attack.