Rule Breaker('罪深い刃''ルールブレイカー', 'rūrubureikā'), also known as 'Blade of Sins', is yet another offensive magical ability created by Ichijou Tsukino, his third after Level Zero and Evil Aim. After both spells were banned for obvious reasons from the Rating Games, Ichijou formulated this one in order to counter female opponents that uses skirts during battles. This ability, differently from the others, uses the technique from the Boosted Gear itself, the [PENETRATE], in order to steal the opponent's underwear.