Coven of Isha

From Lexicanum

The Coven of Isha is a secret pact between some members of the Ordo Xenos and Eldrad Ulthran of Craftworld Ulthwe.

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 marines from the Ordo Xenos had to retake an Eldar relic for Eldrad.

Sources

• Warrior Coven (Novel)