Dust of Nyx

Potion, common

Price: 50-100 gp | no sentimentality

When you drink this potion, portions of your skin appear to show the night sky of Nyx and sparkle with starlight. The effect lasts until you finish a short or long rest. The potion contains suspended multihued dust that resembles a blue, purple, and red nebula.

Paid

While under the effects of this potion, you have advantage on Charisma (Deception) checks

when you attempt to pass yourself off as a Nyxborn creature.

Overpaid

The potion gains a fruity aroma that makes it appealing to drink.

Source: The Gray Merchant of Asphodel