How does this work?

You arrive at MG and pay the entry fee.
You will be given 3 Duelist League cards which you put your name and Konami player number on.
Then you go off and Duel! When you win a duel your opponent gives you one of his duel cards.
When you have collected 5 Duel cards you come up to the counter and hand in your 5 Duel cards and CHOOSE from one of the RARE cards that we have.
If you lose all your Duel cards to your opponents you then come up to the counter and get a common card and may be given a random rare also.

For more information ask at the counter.

The format for this is Advanced Constructed.