Check out the patch notes for version 9.1.5

Content Update 9.1.5 is focused on improving Shadowlands Covenant systems with several changes such as the removal of Conduit Energy and the ability to freely switch Covenant with no cooldown at max Renown.

There have also been practical changes for alternate characters, a host of new customization options for selected Allied Races, and the introduction of Legion Timewalking, Timewalking Mage Tower and Legion Mythic+ dungeons.

Take a look at the full post for all the details.