Acken
Deity
Kind of forget since it wasn't appearing in my subscribed thread sorry :X
Clue 2:
-Deep
Clue 2:
-Deep
Alpha Centauri?
Beyond Earth.
It's a civ5 element
That's a nice guess thoughNext guess: Polynesia. They use stars to cross the deep ocean.
Astronomy and Compass have been guessed, so... Optics, maybe?
Edit: 777th post! Maybe that makes this guess lucky.