you need to have found moss-shadow to be leader.
soon you also need to hunt and catch prey 20 times i think.
And you need to have 300 health.
Soon you need to also go on patrols mabey seven but you need at least one time do the fireclan border.
You must defeat the badger in the cave to make the cave the medicne den.
and lastly you need to get all of the gems in the area.
After some days Bramblestar will make you leader
the moonstone can you activete when it's time for your leader ceremony. you go to the moonstone when bramblestar has made you leader and then starclan will grant you your nine liveshave after the ceremony you will have a vision.