Legacy: Bound in Sorrow
Eris will contact you through the Crown of Sorrow once she has formulated a new plan, and encourages you to continue to explore the Derelict Leviathan and contain its Nightmares in the meantime.
This quest will progress at the next weekly reset.
Failure does not mean loss. It means an opportunity to reassess and find a new approach. Just as Crow's failure led to success, so too could Zavala's. Eris needs to contemplate the next steps in the ritual of severance, and in the meantime it falls on you to contain the growing threat within the Leviathan as best as you can.