Source: The Book of Many Things

Weapon (dagger), very rare (requires attunement)

The blades of these pruning shears bear many nicks and dents but still cut cleanly. The shears function as a magic dagger. The weapon has the following properties:

Ever Sharp. When you hit with an attack using the shears, the target takes an extra 1d6 force damage.

Sever Threads. When you hit a creature with the shears, you can cut that creature’s fate. Until the target finishes a long rest, attack rolls against it score a critical hit on a roll of 19 or 20 on the d20. Once this property is used, it can’t be used again until the next dawn.