I am in the tyrant mines at the academy ruins. The current quest is "Silence the relics". We have already found 8. So it says echos delivered 8/12. We have found the remaining 4 echos but they are locked inside these metal cages. The cages don't appear to have any way that they can be opened.
There are some boxes with red lights on the side but they don't do anything. How do you get these open? Scars just keep spawning making this quest seem impossible.