Thunderdust

Fuses and flintlocks! This gunpowder's as weak as an elf! It's not strong enough to blow a Snotling's nose, and we'll need powerful stuff if we're to protect our brightstone! By Thorgrim's backside, I've got an idea! I'll make a batch of Thunderdust! Back when I was but a beardling, my grandsire mixed up a blackpowder he named Thunderdust. Powerful stuff it was, strong enough to take a greenskin's head clear off at a hundred paces. If I'm gonna mix a batch of Thunderdust, I'll need a copius amount of brimstone. There happens to be a deposit in amongst them tarpits so that's where I'd start lookin'.

Head down to the tar pits, southwest of Dunhilda's Lads in Black Tar Canyon, and search the area for Brimstone Rocks. Return to Olin Falirsson at Dunhilda's Lads when finished.