The Shadowverse Open WEST September Cup is one of the online Monthly Cup tournaments.

Day 1 of the tournament is a Swiss-style tournament where players have a chance to make it into the playoffs.

From the playoffs, the top 8 players will move onto Day 2 to battle it out in a single-elimination format tournamet for the top prize!

The player who has accumulated the highest league point scores from January to September will advance to the World Grand Prix.

The winners of the March, June, and September Monthly Cup, as well as the top league point scorers will be given the chance to play in the Contenders Cup that is held in October.