'The Greenwater Bargain', which you can find at that link or in the side-bar. Find out what happens when the Tau Water Caste resorts to hiring the Blood Axe Clan to help them out with a Chaos problem. What could possibly go wrong?
I've revisited/ borrowed an old Ork gag from the days of the "Ere we go" book, so props to anyone who spots it. Also, whilst I never tell people how to read something, it helps if you keep the British airmen from "'Allo 'allo" in mind whilst reading this one. You'll see what I mean.