The San 'Shyuum (Humans know them as Prophets) are the political and religious leaders of the Covenant. They are physically weaker than the other species but have complete power over the entire Covenant Empire, making them the highest caste. They, along with the Sangheili, formed the Covenant in 852 B.C.E. after a long, violent war. Technological Achievement Tier: Tier 2 Interstellar