The Coven of Isha is a secret pact between some members of the Ordo Xenos and the ancient Farseer Eldrad Ulthran of Craftworld Ulthwé. According to the Coven's librarium, the information provided by the Eldar through this pact has been linked to a number of disastrous events that engulfed the Imperium of Man, including the Sanapan Scouring, the Mortis Annihilation, the Third Coming of Orian and the First War for Armageddon. The Coven has rarely been invoked, for the Eldar rarely require the help of the Imperium, and the Imperium never looks toward xenos for help. The most recent time that the Coven was activated was when Deathwatch Space Marines from the Ordo Xenos had to help the Craftworld Ulthwé to counter the Dark Eldar's recent raids that took many Ulthwé prisoner to Hesperax, the hom