Access the Arena homepage. : https://metaplanet-nft.com/

Tap the Arena button to check out the mission.

Click on the details of the mission you'd like to join to see what it's about. ※To join the mission, you'll need a Metamask login.

You can join a mission by clicking on the number you want to join. ※For personal missions, you can't join a number that someone else has joined because it's a duplicate. You can also join randomly through the Random join button.

After the event ends, you can view the results by clicking View result at the top of the mission list.