Advisor to Queen Mara
In the aftermath of the first Fallen assault against the Reef, Illyn and Prince Uldren Sov examined the communication logs aboard the Ketch of the Fallen Baron who led the assault. They determined that the Baron did not tranmit the location of the Reef to his Kell, ensuring that the Awoken remained safe and hidden for the time being.
Centuries later, during the Great Ahamkara Hunt by the Guardians of The Last City, Queen Mara decided to grant the Vanguard's request for assistance in order for her captured Ahamkara, Riven, to be the last one in existence. They bargained with Riven to provide weapons for the Guardians, and Illyn met with the Titan Joxer and provided him a crate of weapons to use in the hunt for the wish-dragons. She mocked him for keeping his rifle ready in her presence and accused him of having fear as his primary motivation despite all the power the Light granted him, but Joxer countered that his fear was well-founded with the destruction the Ahamkara were inflicting upon Venus. Illyn suggested that the Ahamkara were simply rewriting Venus, not destroying it, but Joxer cared little for the distinction. Opening the crate of weapons Illyn explained that per the terms of their bargain laid out by "her", the weapons would need to be returned once the Great Hunt was finished, and refused to answer any of the Titan's questions about why or who set the terms of the agreement.
Preparing for Ascension
Shortly after the Wolf Rebellion was brought to a close, Eris Morn arrived at the Reef and provided the Queen information about Oryx, the Taken King and his impeding arrival in the solar system. With the knowledge of the Hive God's Sword Logic and his ability to survive death through the use of a Throne World in the Ascendant Realm, Illyn, the Techeun coven, and Riven began aiding Mara in the construction of her own Throne World. As the Techeuns built the Blind Well within the Dreaming City to act as a key to opening a portal to Mara's throne, Illyn created multiple tinctures of Queensfoil to enter the Ascendant Realm, to the point where her hands became stained reddish-black. Utilizing the Queensfoil to manipulate threads of reality within the other realm, bringing some closer together while pushing others away. Once Illyn and the Techeuns completed their task, Mara named her throne world Eleusinia and gathered with Illyn and her coven in the Blind Well. When Sedia expressed concerns over having a key to Eleusinia that could only be charged with paracasual energy generated by Guardians, Illyn told her that they must follow Mara's plan and to remember her vows.
Before the fateful Battle of Saturn Illyn presided over a rare meeting with the Coven, discussing what to do about Oryx, the Taken King. Illyn instructed Shuro Chi, Sedia, and Kalli to take the youngest Harbingers and "plant them" inside the Dreadnaught, "a dead thing to have children of their own".
List of appearances