Poorly mannered slave driver Bharkharth Blackblaster, was forever changed the day he was hit by an overloaded cart of Warpstone that had been cut loose by an opportunistic underling hoping for a fast track in a fast moving industry via the time honoured tradition of killing your immediate superior!

The result of being in close proximity under many many pound of warpstone for ever changed Grungni into THE INCREDIBLE SULK with the power to be horribly mutated every time he feels the slight bit peevish.

And the secret is, he /always/ feels a bit peevish.