This guide will bring you up to speed.
Similarly, some Events also offer Gleamium rewards, but they are available for a limited time only.
If you see an Event offering a Gleamium reward, check that to grind for it.
There are 15 levels of Fighter Mastery for every character in MultiVersus.
Once youreach Level 15 Fighter Mastery for a certain character, you will be rewarded with 150 Gleamium.
The devs frequently release new codes that often reward players with Gleamium for free.
