Wondrous Item, uncommon
Found in a small container, this powder resembles Dust of Disappearance, and Identify reveals it to be such. There is enough of it for one use.
As a Utilize action, you can throw the dust into the air, forcing yourself and every creature in a 30- foot Emanation originating from you to make a DC 15 Constitution saving throw. Constructs, Elementals, Oozes, Plants, and Undead succeed on the save automatically.
On a failed save, a creature begins sneezing uncontrollably; it has the Incapacitated condition and is suffocating. The creature repeats the save at the end of each of its turns, ending the effect on itself on a success. The effect also ends on any creature targeted by a Lesser Restoration spell.
Why does this item even have an image? The description says it looks identical to Dust of Disappearance, which has a completely different image. This was the same case as the 2014 DMG, so they had the chance to fix it but didn't.