Voidwalkers Gone Wild

Even if I can get the zeppelin's frame repaired, I'll have to find something else to power the engine. I'm all out of fuel and there's no place to fill up around here!$B$BTo the south of us is an area of broken land called the Warp Fields. It's full of rogue and uncontrolled voidwalkers, but I like to think of them as walking batteries.$B$BIf you can bring me enough of their essence, I can convert the zeppelin's engine to run on it. Five gold says I'll even get better mileage out of it, too!