Dusk Scythe

A Dusk Scythe appears to a casual observer as a regular scythe. On closer inspection the scythe is not completely opaque, and its blade is so thin as to be nearly invisible when viewed side-on.

Abilities
On a successful melee attack, as a bonus action, you can also hit all creatures within a 15 foot arc centred on the target. Dealing it's damage again as necrotic damage. Creatures only take this damage if the original attack roll is higher than their AC.