Meltzer has been writing about how he feels as if the metal box has another level to it. Thanks to a clue from Jeremiah Lynch, and a little brainpower from yours truly, I was able to open this very difficult box.

Here's what the second riddle says:
"Seeker, you have fathomed the depths of the secret.
You know now what wonders wait in rapture,
Both within, and without.
But if it remains beyond your reach despair not;
The red queen's race has nearly run its course.
Keep the faith, and you shall embark upon the white knight's journey.
The knight's question must be answered,
Only then, will the sevenfold lock at last unfold.
Its lights will lead you through the wreckage,
And prepare you for your last descent." (less info)