Assassin's Jeweled Dagger

You have a +3 bonus to attack and damage rolls made with this magic weapon.

Life Drinker: When you deal damage with this dagger, you gain 3d4+4 hit points once per turn. This ability applies only to living creatures.

Soul Snare: Whenever you reduce a creature to 0 hit points with this dagger, you can choose to capture its soul. The soul is stored in the dagger for up to 10 minutes, granting you advantage on all attack rolls made with this dagger until the soul is released or you use the dagger again to capture a new soul. You can release a stored soul as an action, causing it to manifest as a ghostly apparition for one minute. This apparition can whisper valuable information or assist you by granting you advantage on one roll of your choice.

Shadow Veil:  you gain resistance to necrotic damage.

You can cast Invisibility on yourself once per long rest as an action.

Proficiency with a Dagger allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Magic, Damage, Combat, Finesse, Light, Thrown, Nick