Murphy's Law 7: ...Maybe?

[CoffeeIncluded]

What's going on in the second-to-last panel of the comic? I can't figure it out.

Remember I said that the three critical components are mustard seeds, chlorine gas, and sulfur deposits found in the Alavaan Plains? And that the sulfur is the hardest to get (chlorine gas can be isolated, although it's tricky to do)?

Fir swiped three tiny sulfur pellets.