The Sangheili Ultra, known as the Evocatus (plural Evocati) to the Covenant Empire, is the highest Covenant Sangheili infantry rank. The standard Sangheili Ultras command specific operations and are the Covenant's equivalent to UNSC field officers. They are directly subordinate to Zealots, who command fleets and armies. They are used on high-priority missions, such as defending the Scarab that was deployed in New Mombasa and during the battle in the Mausoleum of the Arbiter. They will wield various weapons ranging from the Plasma Rifle and the Covenant Carbine, to larger weapons such as the Energy Sword, Concussion Rifle, and the Fuel Rod Gun.