The Sisters of the Moon served as wardens for the temple long before the avatar of Sargeras was buried beneath it. Too bad we had to bury them alongside him.
(https://www.infinite-guild.eu/upload/smfpics/legion/tos/sistersmsmall.jpg) (https://www.infinite-guild.eu/upload/smfpics/legion/tos/sistersmbig.jpg)