 Sealed Deck Tournaments are when players must pay an entrance fee in order to get into the tournament, always.After the sign-up, each player is normally given 1 starter deck and 5 booster packs, which then they must build a deck (using only those cards) accordingly to the chosen format the event has decided to run and then play other players in order to earn a spot into the top players.After a set number of rounds, matches become single elimination, until the top four.