This sooty, black powder comes in a small tin, which is set with pieces of jet in the shape of dark-colored goggles.

When you cast this sooty, black powder into an area, it creates a 10-foot-high cloud in a 10-foot spread, centered on you (but not moving with you). The cloud remains for 2d4 rounds, and any creature, other than you, caught in the area (or one that enters it) is blinded for as long as it stays in the cloud and for 1d4 rounds after it leaves (Will DC 13 negates).
Once activated, a dose of this powder is expended and cannot be used again.

Prerequisites: Craft Wondrous Item, blindness/deafness.
Cost to Create: 375 gp, 30 XP, 1 day.