Crystal Legionnaire

Magical strikes. The Crystal Legionnaire's weapon attacks are magical.

Two-Weapon Fighting. When the Crystal Legionnaire engage in two-weapon fighting, it can add its ability modifier to the damage of the second attack.

Invisibility (1/Day) [If black]. The Crystal Legionnaire becomes invisible. Anything it is wearing or carrying is invisible as long as it is on its person. The effect ends if it attacks.

Multiattack. The eldritch knight makes 2 weapon attacks + an extra Longsword if dual wielding (if black)

Warhammer. (If not Black) Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit:  (1d8 + 5) Bludgeoning damage. + (1d8) [Elemental] Damage.

Longsword (if Black) Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit:  (1d8 + 5) Slashing damage. + (1d8) [Elemental] Damage.

Heavy Crossbow. Ranged Weapon Attack: +5 to hit, range 100/400 ft.,1 target. Hit:  (1d10 + 4) Piercing damage. + (1d8) [Elemental] Damage.

Protection. When a creature the Crystal Legionnaire can see attacks a target other than it that is within 5 feet of it.  it can impose disadvantage on the attack roll. it must be wielding a shield.