Wondrous Item, common

This brass mouthpiece changes shape to fit any wind instrument and adjusts to any mouth shape, removing associated performance penalties. It has 1 charge. While playing its attached instrument, you can expend the charge as a bonus action to grant an additional bardic inspiration without using your bardic inspiration slots. The mouthpiece regains its expended charges daily after a long rest.

Wondrous Item, rare

When you don this mask and imagine a face, either the face of a real or imagined person of roughly the same size and shape, the mask alters itself to cause you to look exactly as imagined, giving you advantage on disguise attempts. Because it’s impossible to imagine every detail of a person’s face, even when looking directly at a person, close scrutiny will reveal the artificial nature of the mask, nor does it cover hair or ears.