The situation is dire. "The Leviathan's corruption spreads like a plague. Even as we succeed, Calus's influence strengthens," Eris explains.
"Caiatl has observed Crow and Zavala's successes from afar. She wishes to help us sever Calus's connection to the Pyramid by confronting the Nightmare of Dominus Ghaul," Eris says. "…But Caiatl was not bound with us. There is no certainty a ritual would succeed."
Eris has advised Caiatl to stay aboard her flagship while she looks for another solution.
For now, gather the necessary resources in preparation of another severance ritual.