its extreme importance as a power source. Based on this, and its appearance, the author also compares it to the "Unobtanium" in the 2009 film Avatar . Retrieved from " http://halofanon.wikia.com/wiki/Hafnium?oldid=386794 " Related Categories Categories : The All-knowing Sith'ari Material War of Vengeance Labyrinth Advertisement | Your ad here Latest Photos