Promethean Knight

Promethean Knights are bipedal, autonomous Forerunner defensive constructs. Several legions of Knights represent the central occupying force in the shield world of Requiem, alongside a number of other defense machines.

Overview
The origins of these automatons are both ancient and mysterious. While they differ significantly from the ancient Forerunner Prometheans, a legendary class of Warrior-Servants, they are nonetheless a force to be reckoned with. They are fully weaponized, heavily armored bipedal warriors, easily capable of engaging and terminating perceived threats in almost all environments.

They are known to use Lightrifles and Scattershots as their ranged armament, in addition to a bladed weapon on one hand. They are able to deploy Watcher drones, carried in the back of their armored carapace, for combat support. The Watcher sentinel can greatly improve the Knight's combat capabilities, raising hard light shields or healing the Knight, summoning Crawlers, or flinging back enemy grenades or other ordnance.

A variant of the Knight, known as the Lancer, is capable of teleporting over short distances; this ability allows them to enter the battlefield via teleportation or to quickly retreat during battle. Lancers are also capable of charging at their opponents in a zigzagging motion at an incredible speed. This enables them to make use of the Scattershot's effectiveness in close quarters.

Upon taking critical damage, Knights completely disintegrate; their bodies erode away from where the fatal shot was received and dissolve into glowing particles. Despite this, they can be recreated and revived on-site by a Promethean Watcher.

Appearance
They have two sets of arms; two large, artificial arms at each shoulder in which the weapons are mounted and two smaller arms below the shoulders. The larger arms are composed of separate segments held in formation through an energy field. Knights also have a comparatively smaller set with small, five-fingered hands. These smaller arms are more "organic" in shape and are physically attached to the Knight's body.

Knights are covered in patterns of light and have a fire-like glow around their heads. The head features an armored helmet with glowing eyes and what appear to be grimacing jaws with rows of teeth. This helmet assembly can be retracted in two sections, revealing a glowing humanoid skull underneath.

Subtypes

 * Knight Lancer - a variant equipped with long-range weaponry, greater mobility and enhanced tracking capabilities.
 * Knight Ranger - a variant equipped with Lightrifle.
 * Knight Battlewagon - heavily armored variant, equipped with Scattershot.
 * Knight Commander - command-and-control unit for Knight forces.

List of appearances

 * Reclaimer Trilogy
 * Halo 4