Emberspark

Glowing embers scatter in a 10-foot-radius Sphere centered on the point of impact. For every 5 feet a creature moves within the area, it takes 1d4 Fire damage as the embers explode beneath its feet. The embers fizzle out at the end of your next turn. Colorful flames seem to flicker over the red dust within the flask.

Powder: A powder is not consumed or applied, but rather packed in a flask, usually equipped with a fuse. The contents of a powder flask spread upon impact, affecting a small area around it. In order to use them, you must forego one of your attacks and throw the powder up to a range of 20 feet.