The floating city known as Umbriel flew above Hereguard Plantation before arriving to Lilmoth. When the Bretons and Argonians working in the plantation saw Umbriel, they built barricades to face the Daedric threat. All inhabitants died fighting the Daedra, and their bodies were raised as undead. Their souls were captured to feed the Ingenium.
- An Elder Scrolls Novel: The Infernal City, part one chapter six