Black as the night [Nahko Bear]

Here's an original tune by Nahko. I love the way the Nahko's voice soars up and down several octaves. His guitar tuning beckons me to try it out. Transcribe the lyrics and just play it, because it keeps ringing in my ears days after I first heard it. 

If you can't see the video, just click here to go to it directly, If you can figure out the open tuning Nahko uses, please let me know. Thanks, and enjoy!