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Following The Great Disaster, Jax assisted Eriana-3 in gathering a fireteam of Guardians to travel to the Moon and kill the Hive Prince Crota, Son of Oryx, who had slain thousands of Guardians during the battle, including Eriana's love, Wei Ning. Assisted by Eris Morn, the group recruited Toland, the Shattered for his knowledge of Hive lore and Sai Mota, Vell Tarlowe, and Omar Agah to complete the team. The mission fell apart quickly upon entering the Hive's tunnels, with Tarlowe perishing on the surface and Eriana and Sai becoming separated from the others. As they pursued the Hand of Crota, Jax informed Eriana that something was siphoning her Light and that she was getting weaker by the second. She also reported that Sai's Ghost, Yuka, was suffering the same condition in addition to having been injured beyond repair. Interference was also disrupting their ability to send comm signals or Transmat out, but Eriana asked Jax to transmit a message anyway, declaring that they were pursuing the Hand deeper into the tunnels where they could hear Omnigul, Will of Crota screaming.
They failed to kill the Hand and became separated from Sai as well, eventually finding themselves in The Stills. Jax lost the ability to resurrect Eriana there, and was ordered by her partner to leave and take a recorded message back to the surface where Wei Ning had perished. Before departing to carry out Eriana's wish, Jax watched and recorded as Eriana confronted Ir Yût, the Deathsinger in one last attempt to reach and kill Crota. Upon realizing that Ir Yût's Deathsong was killing Eriana, Jax wiped it from the recording in case its power could survive through media. She hoped that the Praxic Order might be able to recover her information and make use of it in the future while also including a warning to anyone who found it not to trust Toland.
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