The nine lives ceremony for clan leaders takes place at either the moonstone or moonpool.

During the ceremony, cats that the new leader knows, or cats that are important to their lives (like Leafstar's ceremony in Firestar's quest) tell them what the life is for.

They send an agonizing jolt of pain that transfers through the leader's body, symbolizing that a life has been given.

After that the leader now ends their name with star (e.x. firestar, tigerstar, tallstar, e.t.c.)