Promethean Knight

The Promethean Knight is an advanced Forerunner sentinel that appears as an enemy in Halo 4. They deploy Watchers from their carapaces in combat, which increase the survivability of Knights in return.

It appears that they have two large robotic arms, which wield weapons, and two (possibly biological) micro-driver arms below the two robotic ones. They can be armed with every Promethean weapon but are most commonly seen using the Light Rifle, Scattershot, and Blade Arm.

There are several variants of the Promethean Knight which fill a wide spectrum of battlefield roles. At least three variants made an appearance in the E3 2012 gameplay demo - the first encounter showcasing the basic Knight, the second, a Knight Lancer, and a Knight Battlewagon in the final in-game cutscene of the demo. They seem to be the Promethean equivilant to an Elite.

Knight Lancers
A variant of Promethean Knights, Knight Lancers act as scouts and marksmen, using Promethean Vision to track their targets. In line with their role as scouts, vanguards and snipers, they are extremely accurate even at long range. Lancers are able to charge the player in a zig-zag like fashion by teleporting in quick succession, rapidly closing the distance between themselves and the player where they can bring their Scattershots and Blade Arms to bear.

Knight Commanders
Knight Commanders lead groups of Promethean Knights. Accordingly, they are able to bear Incineration Cannons, boast stronger armor and can deploy floating Autosentry turrets to further distract and overwhelm the enemy.

Knight Battlewagon
Knight Battlewagons were rarely seen in the past, being deployed only when other Promethean forces had failed. In addition to the abilities of the Knight Commander, they boast additional Hardlight shielding and utilize the Scattershot, making it a challenge to even get close to them.

Tactics

 * Prometheans are among the most difficult enemies faced in the entire Halo series. Although their large size presents a larger target they compensate with their ability to teleport, which they do at random. Their shields are strong and are able to ward off large amounts of damage. Their considerable strength also makes them risky to approach in close quarters as their melee attacks are devastating. Only Elite Zealots and Brute Chieftans can compare on levels of damage and intelligence.
 * The Gravity Hammer is an excellent weapon against the Prometheans. A direct hit can all Prometheans in a single strike on lower difficulties and severely damage them on higher difficulties.

Appearances

 * Halo 4