Miranda Dagger

This magic weapon has 3 charges you can use to cast a Silence spell in a 5ft radius centered on the dagger. Creatures within the sphere are effectively deafened, cannot cast spells with a verbal component, and are immune to thunder damage. The effects last for 1 minute.
Requires attunement by drawing blood from the palm of your dominant hand.
1D6 damage (20 foot range when thrown)