there isn't any case of a physical attack that bypasses defense, they're all converted to magic. it might be a translation thing because mages actually have their class description say that they ignore enemy defense. magic has the same meaning as ignoring enemy defense in this game.If that's the case, it really would be a lot clearer if any instance where an attack is converted to magic to ignore defense to just say so and leave "ignores enemy defense" for a skill that is actually still physical and can bypass defense.
warlock: splash attack that ignores defense