Or rather, how multiple skull matches are being counted on a nearly-full board of skulls. If BD fills before any of my troops do, it is able to one-shot my tank, which requires doing 200+ damage. Since, in the meta defense lineups I typically see, BD starts at around 25 attack, this means I’m seeing what looks like one continuous mass of skulls being counted as 8 or more separate matches. I have yet to see a post from a dev explaining how the match differentiation is intended to work.
I don’t think we would be seeing nearly as many BD-based teams in the defense meta if not for the above.