Borbos's Joyous Wand of Color (Patreon)

Wand, common

This crystalline, prismatic wand can channel the illustrative intent of its wielder. While holding the wand, you can cause the end to leave behind an arcane pigment of your choice, allowing you to draw in midair or on any surface the end of the wand touches. The effect is illusory, visibly magic, radiates dim light out to 5 feet, and dissipates after one hour of completing a drawing.

If you attempt to draw on an object held or worn by a hostile creature, that creature must succeed on a DC 10 Dexterity saving throw to avoid it.

You tend to make little whooshing sounds when you use it.