What features are there with the Command Post?
This is your headquarters of operations within the Fortress. As you increase your Legion level, you'll have more buildings to construct and upgrade which provide various benefits such as free gems, gold, and more.
In addition, you also have access to Ordinances which are passive buffs applied in every fight. Up to 5 Ordinances are allowed to be active at one time, with each slot unlocking as the Command Post is upgraded.
You can purchase Ordinances for gold when you reach the required Legion level or you can spend gems to unlock them early. To upgrade an Ordinance, you will need to use Aether which can be acquired from Achievements and the Aether Mine.