I can't quite figure out what this style does. Judging from the description, it should provide some initiative bonus and maybe some extra attacks every now and then. In reality it seems to consume huge amount of endurance (comparable with Berserk) without giving much of a boost to initiative and almost certainly does not provide extra attacks per round. It's an offensive style so the high tier defensive skills for the Shadows start to trigger quite rarely if used. That's my experience though, any other other impressions?