Might is similar to Credit, but it only applies to ranked battles. You earn Might each time you are victorious in a ranked battle. If you lose a ranked battle, you may lose Might. Unlike clan ranking, you do not need to play with your clanmates to win Might.
There are 2 types of Might: 5v5 Might and 3v3 Might. To view your 5v5 Might, tap the Credit rank display at the bottom right corner of the main menu.
To view your 3v3 Might, tap "Rank" in the main menu.
Then tap "Rank" again in the menu on the left side of the screen.
Here you can view either your 5v5 or your 3v3 Might by selecting one from the drop-down menu in the top right corner of the screen.
You can also view the Might and rankings of the other players on your server in the list at the right side of the screen.