I tried to help my friend complete his exotic sword quest today. We got the crucible kills done just fine. Then we went to the Dreadnaught, killed the warden nights quickly and... Nothing. We tried having him be the one to kill them (both using a super and not using a super) he tried it by himself--still nothing. The door will not open. We're we doing something wrong? I know when I did it I had another friend of mine help with the warden knights and Ecthar as well. Is this broken? Edit: Got it to work finally. Just had my friend do all the damage on the Knights. Thanks for the help everyone