Gith Haladie

Weapon (double-bladed scimitar), uncommon (optional attunement)
  A gith deprived of her dragon needs to travel light. The gith haladie is the ideal, multifunctional tool; a devastating blade, bow, and shield rolled into one. With such a diverse weapon, one can hunt food, clear a watering hole, and defend oneself, all while retaining mobility.
  Psionshield. As a bonus action if you are proficient with this weapon, you can spin the haladie using both hands, creating a glowing shield of psionic energy. You gain a +2 bonus to AC until the start of your next turn. You can use a bonus action to make a DC 8 Constitution check at the start of each of your turns, continuing the effect on a success. On a failure you tire of the activity and lose the AC bonus. You can make melee attacks with the weapon as normal while the shield is active.
  Optional Attunement: Psionic Shot. When you take the Attack action while holding this weapon, you can mime pulling back on it as if it were a bow, causing an arrow of shimmering psionic energy to materialise. You can make a ranged weapon attack, using either your Dexterity or Intelligence modifier for attack and damage rolls. The attack has the statistics of a shortbow and deals psychic damage on a hit.
  Haladie. A haladie is a martial melee weapon that deals 2d4 slashing damage on a hit and has the finesse and two-handed properties.
  Special. If you attack with a double-bladed scimitar as part of the Attack action on your turn, you can use a bonus action immediately after to make a melee attack with it. This attack deals 1d4 slashing damage on a hit, instead of 2d4.
  Rare variant: Attacks with this magic weapon have a +2 bonus to attack and damage rolls.
  Very rare variant: Attacks with this magic weapon have a +2 bonus to attack and damage rolls. The AC bonus of Psionshield increase to + 3.