Sorry, but I have to say, there is no such thing as a death nail. A death knell is the tolling of the bell indicating one's death and would the appropriate phrase here. Although it's probably not unlikely there's a Rare called "Death Nail" in the game.Quote from ruksak
My personal opinion is that Ladders are a mistake, a death-nail to many social avenues. As well, I feel we'd all be better off if they'd spend time dev'ing complex (all-inclusive) modes like Tiered Rifts, Uber Events and other challenges which could bring competition to Diablo 3. Ladders are an antiquated and borrowed idea, rife with issues that I believe will create a schism in the player base and likely be seen as a mistake, a waste of time and development resources.
Just had to post because I've seen "death nail" twice this week now, and that's an annoying new one for me.