Talk:Arena/@comment-182.173.73.130-20171106022835/@comment-28089742-20171106024556

At your Arena menu page, you'll notice that there's a blue arrow button at the top right named "Upgrade". Click on it and clear all the battle available.

Each battle cleared rewards you 20% grade point. 100% grade point will let you upgrade your level by 1. From there you get specific rewards as stated above.

Currently we are able to reach Grade 4.