Note: The old names are in parenthesis as some players will still call these cubes by this name.
The free cubes Solid (Master) and Hard (Meister) and the cash shop cubes Glowing (Red) Bright (Black).
Solid cubes can rank up to Unique tier very rarely, Hard cubes have a better rank up rate than Solid and can go up to Legendary.
Just want to correct this. Solid cubes can tier up to legendary. they were previously called meister cubes. Hard cubes can tier up to Unique and were previously called Master Craftsman Cubes