Whisper

Requires attunement.
While you are hidden or invisible, your attacks
with this weapon deal psychic damage instead of
any other kind of damage they would deal.
As a bonus action, you can roll a DC 15 Concen-
tration check. If you succeed, attacks you make
this round do not end your invisibility or reveal
your position, if they otherwise would. If you fail,
you can choose not to make attacks.