royal decree, hands down. trap negation is king.

Mirror Force all the way. Saves your but and gets rid of a lot of your opponent's monsters.

I like Rivalry of Warlords MFC-048
It messes up decks that don't have sub-type themes(dragon,
insect,fiend,etc) :p

mirror force for me. i love the unique way how it beats the crap out of your oppenet i think it is a staple or should be.

as a water deck player i have to say i like Tornado wall, admittidly it is easily destroyed or countered, but if u can keep it active then it can be a real problem for your opponent

mirror force hands down so much field advantage all gone in 1 quick trap, then a nice kick in the shin with a spirit reaper and you get a 5-6 card advantage 1 turn sick!