The Rebirth
The Rebirth is a ritual carried out every year in the Plain of Thrones before the assembled tributaries off all the peoples subject to the Chosen. This is when the flesh-tithe is brought to Osrakum. The Chosen, arrayed on the thrones of the Umbilicus, witness the renewal of the God Emperor, a repurifying of his blood to purest ichor, and with Their renewal, the Commonwealth is renewed. The Apotheosis is a special version of the Rebirth, where the elected Candidate is transformed into the God Emperor