http://www.deviantart.com/download/100793592/Mythic_Dawn_Guard___colored_by_stikyo.jpg is a character from The Elder Scrolls IV: Oblivon.
He is with the Mythic Dawn and they have a saying "Dawn is breaking. Greet the new day"

Now..
The Order of the Mythic Dawn is a Daedric cult that follows the teachings of Mehrunes Dagon. They were responsible for the assassination of Emperor Uriel Septim VII and his three sons, as well as orchestrating the Oblivion Crisis. The leader of the Mythic Dawn was Mankar Camoran, whom they called "The Master".

This info comes from TES wiki.

Just thought I might share this with some of you that didn't know because these future DLC topics get a new page every 3 seconds, people still question what this Dawn Guard is. But you can find all about it on wiki, so..

Please use the existing topic for the DLC discussion