Warden Eternal

The Warden Eternal is a Forerunner Promethean construct that considers itself the "keeper of the Domain and her secrets". During the Battle of Sunaion, the Warden was encountered by Fireteam Osiris and incapacitated them in battle with a hardlight blade. It then informed Spartan Jameson Locke that John-117 had been granted access to a nearby Guardian, though such permission was denied to Locke and his team.

Trivia

 * Warden Eternal wields a unique Hardlight blade, that sports two blades as opposed to the usual single blade the Promethean Knights use.

List of appearances

 * Halo 5: Guardians