If you are ever looking to freak someone out for a quick second a good card is "rocket arrow express" 5,000 attack 0 defense and u can special summon it from hand by controlling nothing, downsides are u can't set cards or special summon for that turn and each following turn you must send all cards in hand to grave or it gets destroyed, even if I don't wanna waste a hand it's a good wall against things like Chaos Max or other high attack stats.