You have a +1 bonus to attack and damage rolls made with this magic weapon.
As a bonus action, you can retract the katar into your gauntlet or extend it from there. While it is extended, you can use the weapon as if you were holding it, and you can't use that hand for other purposes.
Proficiency with a Shortsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Vex. If you hit a creature with this weapon and deal damage to the creature, you have Advantage on your next attack roll against that creature before the end of your next turn.
Notes: Bonus: Magic, Melee Weapon Attack: Piercing, Damage, Combat, Finesse, Light, Vex