The Dance of Life and Death

A pair of +1 rapiers, if these swords are separated
for 24 hours, they lose their magic and become
normal rapiers.
One deals radiant damage, the other deals necrotic
As an action you can whirl around in a flurry of
blades, in a show of elegance and death. All
creatures in a radius of 10 feet around you make a
dex saving throw. On a failure they take
2d8 radiant and 2d8 necrotic damage, or half as
much on a successful save.