Yvraine was originally born on Craftworld Biel-Tan. She walked many paths, from that of dancer to Warlock to warrior. She eventually became a famed Corsair leader until a mutiny forced her to flee into the Webway.
Yvraine later became a gladiator in Commorragh, fighting many foes before falling to a Priestess of Morai-Heg. However, while between life and death she was resurrected by the awakening god Ynnead. Her birth caused a great Dysjunction in the Dark City, and together with the Visarch eluded capture by Asdrubael Vect. Yvraine and the Visarch traveled to Biel-Tan, where the duo gathered together some followers of Ynneah known as the Ynnari. After saving Biel-Tan from a Daemonic invasion by sealing a Webway Portal on the Maiden World of Ursulia, Yvraine informed the Seers of Biel-Tan that Ynnead could be fully awakened without sacrificing the Eldar race, a process known as the Seventh Path. However, opening this path required an Avatar of Ynnead, and during the Battle of Biel-tan Yvraine performed a ritual on the Craftworld's Infinity Circuit that gave birth to Yncarne at the cost of millions of deceased Eldar souls. However, the effort was necessary in order to purge The Masque from destroying the whole of Biel-tan's Infinity Circuit.
Gathering more followers, including elements from Ulthwé, Harlequins, and Altansar, Yvraine led an expedition to recover the Crone Swords, relics vital to the Seventh Path. After being offered the soul of Altansar Warlock Guentilian Onyxblade, Yvraine gained her Gyrinx as a companion. The adventure led the Ynnari to Belial IV and eventually Iyanden, where she led the successful effort to save the Craftworld from a Nurgle invasion. After gathering the Crone Swords the Ynnari next undertook an expedition into the Webway to the world of Kalisus in the Cadian System, battling Ahriman's Thousand Sons along the way. During the battle, Yvraine demonstrated her ability to resurrect Rubric Marines, but she quickly killed the Chaos Space Marines once Ahriman had agreed to spare her.
On Kalisus, Yvraine was part of the Eldar expedition that met the Imperial survivors of the Thirteenth Black Crusade. There they forged an alliance with Humanity, guiding them to Ultramar. On Macragge, Yvraine worked closely with Belisarius Cawl to resurrect Roboute Guilliman. After Guilliman is reborn, Yvraine and the Visarch bid their farewells to the Imperials.
Later, Eldrad Ulthran sent Yvraine to retrieve the Hand of Darkness from Mortarion's Whispering Tower on the Plague Planet. Passing through trials of temptation by Slaanesh in the Black Library, Yvraine recovered a rose of Isha, said to grow only where the goddess walked, which allowed her to enter the Garden of Nurgle. Passing through the Garden, Yvraine was able to secretly enter the Whispering Tower and steal the Hand of Darkness.
- 1: The Gathering Storm II: Fracture of Biel-Tan trailer
- 2: Gathering Storm: Fracture of Biel-Tan
- 3: Gathering Storm: Rise of the Primarch
- 4: Hand of Darkness (Audio Drama)