The Southeast Asia & Oceania Shadowverse Open March Cup is one of the Monthly Cup tournaments. Day 1 of this online tournament is conducted in a Swiss draw format. 

The top 8 players move onto Day 2, contending for a cash prize in single-elimination matches. 

The player who has accumulated the highest league point score from January to September advances to the World Grand Prix, and the two players with the next highest scores compete in their region's Contenders Cup.