[SPOILER] Black Plague ending questions...

[Bek]

There are heaps of theories, especially regarding what requiem brings to the table but I haven't played much of it myself. Some say that the chance to write the email is a test itself, and no matter what the email never gets sent. It was just the hive mind testing to see if he would honour his agreement. Which he didn't, so I guess its implied he was killed / trapped after that.

I guess it's implied his friend will be suspicious enough to not rush into the mine and notify enough people of whats going on there that their discovery / extermination is guaranteed.