Vicious Thrust. The blade can be snapped off and embedded into a target on a successful strike or throw, causing 1d4 damage per round to the victim at end of their turn until removed (requiring a DC17 Constitution saving throw).
Rebuild Blade A long rest is required to re-build the blade, using salvaged components.
Using your innate street knowledge, you have made a dagger hilt to which you can attach a constructed barbed blade. Your knowledge of the blade and hilt connection allows you to specify when the blade can detach, using a simple flick of your wrist in the right direction.
It hurts once, it hurts again
Proficiency with a Dagger 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.
Nick. When you make the extra attack of the Light property, you can make it as part of the Attack action instead of as a Bonus Action. You can make this extra attack only once per turn.
Notes: Damage: Piercing, Damage, Debuff, Combat, Finesse, Light, Thrown, Nick