Chaos Lord NAVIGATING THE EYE OF TERROR
CHAOS LORD

The Role of Lords or, "Everything Is Falling Into Place According to My Design".

A concept that is more prevalent than even the last Codex is that Chaos Lords and the Marks they bear (or don’t bear) shape the units in the army. Lords dedicated to one Patron may not take units Marked by the opposite Patron, as the Chaos gods hate each other as much as they hate the Emperor. So it wouldn't do for a Khorne Lord to take Slaanesh Daemonettes (no matter how 'interesting' the models look). 

Lords with a Mark of Undivided are not so choosy and have the most freedom of choice in their unit selection (unless playing a specific legion that has restrictions, like Iron Warriors or Night Lords). 

Also, the Mark your Lord has will dictate how Marked units function within your army. The short rule of thumb is this: 

Chaos Lord

If the Mark of the unit is different than the Mark of your Lord, the unit is an Elites choice. If the Mark is the same as the Lord then the unit occupies the same force organization slot. This only applies to Troops choices.

The exception to this is the Mark of Undivided. You could have an un-Marked Lord and Undivided units under him if you so wish, with the Undivided units staying in their designated Force Organisation slots (so Chaos Space Marines with Mark of Undivided in the army of an unmarked Lord stay as Troops and do not move to Elites).

An un-Marked Lord is perfectly acceptable as well, and could represent an arch-mercenary or bounty hunter in power armour with cool wargear gadgets... such as a jump-pack and a combi-flamer (hmmm... better stop before LucasFilm™ lawyers come a-callin'...). This character could be in it for the plunder and nothing else.

The strength of the new Codex is that you as a player are allowed almost unlimited opportunity to theme the army according to your whims. Do you want a Lord and Retinue mounted on Daemonic Steeds? You can do that and I think Warhammer Fantasy Chaos Knights, Undead Black Knights or Cold Ones would work great for this. Or, you could have a looming Daemon Prince with an adorable pet Spawn at his side. Or a mystical Tzeentch Wizards Coven complete with a raven familiar and thrall wizards. Or, or, or.... like I said, it is a very versatile list.

Home Marks of Chaos Chaos Lord Chaos Wargear Veteran Skills Psychic Gear Daemonic Gifts Daemon Weapons Vehicle Upgrades
Home Marks of Chaos Chaos Lord Chaos Wargear Veteran Skills Psychic Gear Daemonic Gifts Daemonic Weapons Vehicle Upgrades

Armies of the Warhammer 40,000 Universe
Black Templars
Dark Angels Orks
Catachans
Dark Eldar Space Marines
Chapter Approved
Eldar Tau
Chaos Space Marines Imperial Guard Tyranids
Daemonhunters Necrons Witch Hunters