For what it's worth, I think in a proper hardcore tourney there is a place for a death clock, and I actually quite enjoyed it at the warmahordes games last year. But, Naghammer, although it is the closest thing we have to a tourney, is not really hardcore. Knowing the majority of folks that go there as I do, I think no death clock is the right call. There is, after all, always day 2 for the hardcore grudge matches
