I played magic for about 4 years when i was a in my teens, completely casually, never even heard of fnm. Now I'm twenty and I've got a job and money to spend on a game which I've loved forever. I'm going to my first standard tournament tonight with an Illusions deck I made after buying the event deck. I put in wurmcoil engines instead of the mediocre rares the deck comes with, and i added a sideboard with a very strong control element. I have no idea what the metagame will be at this shop, but my question is; What should I know going into a tournament with players of high caliber (I've seen there 'casual' games) for the first time? How scared should I be?