User blog comment:KillRoy231/What Dean should have done about the Mark/@comment-73.203.199.6-20160924030312/@comment-1031724-20160929221819

I suppose that's a good point. Though Death could have tossed them into the Empty, unless that's an aferlife-only place, but then again, Sam, Dean, and Castiel have entered Hell and Purgatory while alive. But then, if he could send them somewhere with no chance of escape, Death wouldn't have needed to tell Dean to kill Sam to prevent Sam from eventually finding a way to get Dean out...