A harp steeped in shadowy magics. The haunting chords may evoke awe, fear, unease, or cryptic wonder in your audience. The instrument's pillar has been worked to resemble an elven woman, and its neck forms elaborate wings.
As an action you may attempt a DC 15 performance check. If you are proficient both with harps and the performance skill, this check may be made with advantage.
If you succeed your check: All space within a 10 foot radius of you is completely imperceptible to Aberrations and Undead until the end of your next turn. They cannot see, hear, or target anything within the area; instead perceiving only beyond the space as if it is perpetually just outside their notice.
If the check is unsuccessful: The tune offends the ears of all Aberrations or Undead that can hear it. Until the start of your next turn, they have advantage on all attack rolls against you.