Hi, i was wondering about the side deck.I put spells and traps in there, but I don't know if we exchange cards that are in there BEFORE the match, or can we change it in the MIDDLE of the match. I must know.Ok, here is an example, 1. A person plays a continuous spell, and I have a MST in my side deck, can I use it in my turn but just taking it out and putting it to my hand? 2. It's before a match and I'm gonna exchange my cards with some cards from the side deck. can I do this?. Created by ?. games-recreation-en - card-games-en

The side deck is used during the match, but only in between the duels of that match. So your 1 and 2 are both wrong - you never touch the side deck during a duel, and you must start the match with your original main deck, you can't modify it before you start. The earliest you can side deck cards into your main deck is after each duel in the match.So as an example, you start a match against one opponent and you keep an eye on the things they use. Though you lose duel 1, you can then side deck in cards that work better against your opponent's deck and hopefully win duel 2 and 3 to win the match.