I wouldn't big up the bosses. I don't remember one defeating me first time except Seymour on Mt Gagazet. And that was probably over confidence after repeatedly kicking his arse.

Actually my first game over was from a marlborough, which if you're not prepared (as u may not be as its random) can kill u very easily in a short time. More dangerous than a boss to newbies.

Of course I now know to always carry 1st strike. But anyway u need a card if u dont want to read strategy guides.