In the above images you can see two examples of the Cube interface. On the left you will find the Commander Info page which can be reached by clicking on your Commander portrait in the upper left hand corner of the screen and clicking the Cube tab.
On the right side is an example of what you see when you access the Cube tab in the Gear Factory.
They are both the same thing with the exception of the Commander info which is missing from the Gear Factory.
What are Cubes?
Cubes are more like Gear than like Chips or Modules in that Cubes add multiple stats per Cube. The Cubes are divided into three categories: Time Cubes, Space Cubes, and Energy Cubes.
But like Modules, Cubes are unlocked at specific levels of Gear Factory Promotion.
Cubes are unlocked at Gear Factory level 25. By the time your Factory reaches level 25, you will likely have quite a bit of cube enhancement and promotion materials in your bag, however the cubes themselves you will not have.
In fact, you will actually find them in Cube Random boxes that only become available as a reward in the last two daily Quest Point boxes claimed once your Gear Factory is level 25.
This is a good reason to do all your daily Quests because it is here that those boxes are found. Once you have at least one Time, Space, and Energy Cube you can add them to the open slots and begin enhancing and promoting them.
Enhancement and Promotion
And like with Gear, Chips, and Modules, Cubes you want to enhance, click Enhance and select the material to increase its level. Doing this as you can see above increases the overall stats of whichever the Cube you are enhancing. Cubes are like Gear in they actually enhance multiple stats. Time Cubes enhance ATK stats, while also enhancing Troop DEF, and HP. Space Cubes enhance DEF stats, while also enhancing Troop ATK and DEF. Energy Cubes enhance HP stats, while also enhancing Troop HP and ATK.
And like Gear, Chips, and Modules once a Cube has reached its maximum enhancement level, to continue it must be promoted.
Promoting a Cube will allow its star level to be raised, and allow it to be further enhanced.
It’s important to continue to enhance and promote your Cubes as they raise your overall Might level.
(Unlike Troop Chips which provide very little enhancement to overall Troops stats, Cubes provide a ton of enhancement to the overall Troops stats, and they are integral to your bonus stats as a whole. It is incredibly important once you have unlocked this that you enhance and promote it regularly.)
Do not forget to add Cubes at Gear Factory levels 25, 27, 29, and 31. You may forget these are here since they are not required to give points in the daily quests, however you will continue to amass the materials as you will continue to get the Cube Random boxes each time you complete your dailies. So try and have a look to see what you can enhance and promote regularly.
You will also regularly get Cube enhancers and promoters as part of event rewards.