Making your own gunpowder sounds way too methodical

This is short, but let's face it, it was a continuation of clearing out Rivergard Keep of a bunch of water cultists.

The party stormed the main keep, killed a wereboar, found a secret staircase and a hidden room, and really went to town on those cultists. They should now be considered a threatened species, soon to be extinct. As a GM, I'm very proud of them, of course.