Duskbane

You gain a +1 on attack and damage rolls made using this silvered magic weapon.

On a hit, the dagger deals an extra 2d4 Radiant damage to shape-shifted creatures (as a result of the Polymorph spell, for example). Additionally, when a shape-shifted creature is dealt damage by this dagger, it reverts to its true form and can't shape-shift until it regains a number of Hit Points equal to the damage dealt by this dagger.

Nick (Mastery): When you make the extra attack of the Light property, you can make it as part of the Attack action in· stead of as a Bonus Action. You can make this extra attack only once per 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.

Thrown: If a weapon has the Thrown property, you can throw the weapon to make a ranged attack, and you can draw that weapon as part of the attack. If the weapon is a Melee weapon, use the same ability modifier for the attack and damage rolls that you use for a melee attack with that weapon.

Proficiency: simple, dagger Source: Zamanora: Ballad of the Witch p. 194 (Homebrew)