These are the requirements for Order of the Crow:
Iron: Lv20, 5,000 areas explored, 25 teleporters repaired
Brass: Lv30, 10,000 areas explored, 50 teleporters repaired
Sapphire: Lv40, 20,000 areas explored, 100 teleporters repaired
Ruby: Lv50, 40,000 areas explored, 200 teleporters repaired
There will be a couple more requirements soon, too, but you early adopters get it a little easier.
(this thread created at the suggestion of @toadlover
so we can stop making multiple threads asking what this is.)