The Basic Idea behind my legion is when the Thousand Sons fell to Chaos, there were 4 Brothers within the Legion Aman-Sec, Aman-Jast, Aman-Caan, and Aman-Thay. After the Rubric was cast, Aman-Caan had a vision of what he believes is the path to save the Legion. Each of the 4 Brothers would have to follow a different path of Chaos, (among other things to keep the story short). Aman-Sec followed the path of Tzeentch and Founded the Cult of Dust, Aman-Jast followed the path to Nurgle and founded the Cult of Death, Aman-Thay followed the path to Slaanesh and Founded the Cult of Excess, and Aman-Cann (driven insane by the visions) turned to the path of Khorn and founded the Cult of Slaughter.
Aman-Sec: Lord of the Cult of Prospero
Lieutenants to Aman-Sec (Exalted Sorcerers)
Another Lieutenant to Aman-Sec (technically a Dark Apostle, he's usually fielded as an Exalted Sorcerer)
Yet to be named Daemon Prince
Thousand Sons Sorcerers
Lords of the Cult of Death (Death Guard)
Hidden one (used to count as a Callidus Assassin, not sure now since they can't ally in Matched play)
Scarab Occult Terminators
Helbrute - Void
Helbrute - Mack the Knife
Rubrics - Blue Squad
Rubrics - Yellow Squad
Plague Marines (Cult of Death)
Pox Walkers (Cult of Death)
What I have so far to show an example of each of the 3 Cults I have so far
Death Cult Bloat Drone
Warp Talons (originally I was just going to do my Thousand Sons with the Squad leaders only having the Head crest, I've since changed my mind, I;ve just not updated these yet)
Obliterators
Land Raider (not really a fan of how it looks with decals, that will be fixed as soon as I can find a Chaos Reinforced armor set and
TS doors)
Heldrake
Rhino
Magnus
Ra was trying to go for the look of the Obsidian Egyptian statues wearing Golden armor
It's not until I look at the close up pics that I realize just how unfinished my paint jobs really are.