The ceremony itself was fairly simple; upon the death of the reigning monarch, the sacred Kral Zera flame that they themselves lit is extinguished, and candidates are summoned by the Archivist. Once the ceremony has begun, one of the candidates would take a torch, and ascend the Steps of Destiny to relight the Kral Zera. Theoretically, any Galra had the right to try, though practically, only Galra who commanded either great respect or fear amongst their peers could expect to ascend the steps unopposed.
“Through 33 rulers, during times and peace and times of expanse, this flame has burned for over 13 millennia. From our first, Brodar, to Vrig the Great, and longest and most powerful of all, Zarkon...But his time has passed. Our next ruler must ascend the steps of destiny and relight the Kral Zera.” - The Archivist