Forcesaber

This is an exotic lightweapon, requiring specific proficiency to use with any real skill.
  There is a button that is pushed to extend a 3.5 - 5 inch "light" blade. The color of the blade is based on the gem used to craft the item.
  Red light is often those created by the Dharg Lords.
  D'Nali Knights tend to use Blue, sometimes green and even more rare would be yellow, purple, or orange. There are rumors of black or grey, but these are considered myth at this point.
  When the light is extended it gives a bright light for 5 feet, dim light for 5 feet, and gives 1d8 slashing damage, 1d6 force damage, and on a crit there is a 5% chance it can cut off a hand.
  This item has a Dexterity requirement, and so anyone using it has a disadvantage on attack rolls unless they meet the Dexterity requirement of 11.
  This item has a "Hidden" quality which gives an advantage on Dexterity (Sleight of Hand) checks made to conceal the weapon.
  It is also versatile, where the slashing damage goes 2d6 damage.