"You're not my problem. I have an empire to run, I'm not an interdimensional vigilante. Besides, several of my goals for that empire would be easier to achieve if I retained routine access to Milliways, and I don't think the bar likes it when her customers try to kill each other - as you've noticed. And, you're asleep. Most people, when they die in their dreams? Don't die in real life. I doubt magical solutions would hold, for the same reason - and I have no way to check, either way."