You can open "Cube" when you reach level 32, simply click on Cube icon and it will open it's panel.
Important points:
* Cube Bonus effects are given to all your team
* Cube makes effect in all battles
You will open Cube's window which contain the following menus:
Item A - UPGRADE: Upgrade the gem's level
Item B - SYNTH: Synth Rainbow Gems
Item C - RECYCLE: Recycle Rainbow Gems
Item D - EXCHANGE: Change types of gems
Item E - DETAILS: Show details of any gem
Item F - SOCKET: Socket gem in cube
Item G - UNSOCKET: Unsocket gem from cube
Item H - ATTRIBUTE BONUS: List the current stats from your cube
Item I - GOLD & DIAMOND: Shows your current Gold and Diamond
Item J - OWNED GEMS: List the gems you own
Item K - OWNED RAINBOW GEMS: List the rainbow gems you own
Item L - FILTER GEM LEVEL: Filter the gems you own by level
Item M - FILTER GEM TYPE: Filter the gems you own by type
Item N - CLOSE bu
Item O - HELP bu
Cube Socket Sequence
Cube Requirements to Unlock Sockets
Slots Restrictions
Gems x Sockets