Eris has returned with a plan to drive Calus out of the lunar Pyramid by converting the remaining Nightmares bound to the ritual participants into Memories. With these powers at her disposal, Eris can permanently sever Calus's connection to the Pyramid.
Commander Zavala also weighs in with his own experiences. "Recently, I've been… visited in the H.E.L.M. and elsewhere, by one of the Nightmares Eris bound to the Crown. We need to push harder," he says, visibly unnerved.
"I'll be accompanying your next severance mission to weaken Calus's connection to the Pyramid. You and I will get this done."
Prepare for the next ritual of severance by returning to the Leviathan to capture Nightmares.