Contra
In each round, players play sets of 2. In the first game of a set, player 1 gets to see player 2's deck and build a counter to it. In the second game of a set, player 1 can build another deck, and player 2 gets to see it and build a counter to it. If one player won both games in the set, they get to move on and their opponent is defeated. If the set was tied, they play another set. They keep playing sets until one of them wins both games in the set. However, if 4 sets have been played with no winner, AND some other pair of players from the same round have already finished, then both players lose. The tournament is otherwise single elimination like every other tournament.
Players are not given extra time between games to make their counters, so they should prepare decks to use before the tournament.
To make the tournament quicker, deckout is banned as a tactic. If a player decks out unintentionally (without using hourglass/golden nymph) then they win that game.