The first High Clerist was a Chilkit by the name of Scrol. High Clerist Scrol ruled a large empire in the bronze age on Chilken Prime. His empire strecthed across most of the oceans and even large segments of jungle on every continent. His reign started the rise of the office of the High Clerist, which persisted until the downfall of the New Chilkit Coalition.
The High Clerist's office was disrupted during the Unification Wars when the High Clerist and a great deal of his family died from radiation poisoning. The next Clerist didn't come to power for 13 years, during which time he was recovering from the effects of a nuclear blast and maturing, as he was only a toddler.
The line of the High Clerist continued undisrupted for thousands of years, until the time of High Clerist Huj. He is known as the Fourth High Clerist, though that title and number refers specifically to the Clerists ruling since the Kriost and Chilken joined to become the Coalition. At that time, young Kyrill, an idealistic teenager, and his mother, a battered, emotionally volatile Chilkit, threw High Clerist Huj and his ruling elite from the Tower of the High Clerist. They plunged from the Hall of the Ancestors and perished on the streets of the slums below. Kyrill then took office as High Clerist.