Oil of Tattoos (Patreon)

Potion, common

This flask of oil contains a swirling plume of ink. You can lather the oil over a patch of skin on a willing creature over the course of 1 minute. At the end of the minute, the oil magically creates a tattoo on the skin. You choose the tattoo's design. The tattoo remains indefinitely or until it's targeted by a dispel magic spell or similar magic. The flask has enough oil for 5 applications: a small tattoo consumes 1 application, a medium tattoo consumes 2, and a large tattoo consumes 3.

"Guaranteed to give your dear old mom a heart attack."