I'm a big Nurgle fan, maybe hes showing his love?  -_-<br/><br/>As for the warp thing, gravity wells fuck up the delicate calculations in warp drive operation something fierce i believe, which is why jumps in and out normally happen at a system's terminus, and followed by a several day/hour/etc slowboat in to the planets and actual destination. It<em>is</em>perfectly possible to jump from within a system/to within a system, but doing so has a catastrophically high chance of going terribly wrong and ripping the ships apart and best, and casting you, lost, into the Warp at worst. I do believe jumping deep into a system is occasionally used as a tactic for surprise assaults, iirc, there was a ork fleet that once jumped from the warp almost right into orbit around the target planet. The defenders took some time off pondering their imminent doom to boggle at the sheer insanity of it.