Harmonizer

Harmonizer is one of the Five Blades of Corusk. Across the shiny surface of this magic weapon are etched images of a wizard performing a ritual over five swords. You gain a +3 bonus to your attack and damage rolls made with this magic weapon. When you attune to this magic item, the sword creates a clone of you and each creature Allied to you within 120 feet of you. The clones are Fey, appear in an unoccupied space within 30 feet of you and they are Hostile to you and your allies.

Vex (Mastery): 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.

Finesse: When making an attack with a Finesse weapon, use your choice of your Strength or Dexterity modifier for the attack and damage rolls. You must use the same modifier for both rolls.

Light: When you take the Attack action on your turn and. attack with a Light weapon, you can make one extra attack as a Bonus Action later on the same turn. That extra attack must be made with a different Light weapon, and you don't add your ability modifier to the extra attack's damage unless that modifier is negative. For example, you can attack with a Shortsword in one hand and a Dagger in the other using the Attack action and a Bonus Action, but you don't add your Strength or Dexterity modifier to the damage roll of the Bonus Action unless that modifier is negative.

Proficiency: martial, shortsword Source: Treasures from Oerth p. 36 (Homebrew), Player's Handbook (2024) p. 215