Valley Elf Infantry

Fey Ancestry. The valley elf infantry has advantage on saving throws against being charmed, and magic can’t put the valley elf infantry to sleep.

Hold the Line. Valley elf infantry have advantage on attacks of opportunity as long as another ally is within 5 feet of the target.

Sentinel. Valley elf infantry can make attacks of opportunity even against targets that have taken the disengage action. Additionally, hitting with an attack of opportunity reduces the target's speed to 0 until the beginning of the target's next turn.

Multiattack. The valley elf infantry makes two longsword attacks or two heavy crossbow attacks

Longsword. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) slashing damage. 

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

Sword Burst. The valley elf infantry creates a momentary circle of spectral blades that sweep around them. All other creatures within 5 feet of them must succeed on a Dexterity saving throw (DC 12) or take 2d6 force damage.