I am working for the Strum!! a but late but yeah just finished O Captain quest and decrypted the Relics of golden age. Now the issue is its asking for 5 legendary and 1 exotic decrytions. Problem is any legendary engram from postmaster or crytarch is not counting for this. Is there a known bug or am i wrong at any step. one of my clan mate is also at the same step.. EDIT: found that picking legendary engrams as dropped is counting for this quest. vendor bought engrams didnt count. Need an exotic now (cashed one from ZUR n it didnt count :( )