In Legion’s Time Walk, the mage tower will function similar to the one it had in the expansion. Champions of Azeroth will be able to use the Mage Tower again. Legion Timewalking will be available for the first time with 9.1.5 and is a great way to recall the heroism of times gone by. When Sargeras was defeated and launched his last vengeful attack on Azeroth, the mage tower was closed, and it has not been accessible since.
Shortly after the Burning Legion invaded the Broken Shore of Azeroth, the Alliance and Horde began using the mage tower at Deliverance Post to allow their most promising champions to train at the highest level.