Really late reply but thanks WarriorFish! Much appreciated! I may have to repaint a few panels I think, as I have a couple that have mistakes that I need to tidy up.
For bases I think Astrogranite will work fine for this as it's pretty dull and the majority of my my friends armies that I play against have this basing scheme so it makes sense from a narrative perspective. I will give the snow a go as it should make them pop a little bit too.
I've been looking at whether I want to repaint my Chaos to this scheme or Word Bearers and have decieded to do this scheme. I have a lot of ideas for models and for fluff as well as having a narrative campaign coming up that I'm running with my friends, which I can use to help expand my ideas.
I've written up a rough history of the Chapter, although they're technically a Warband, they still are organised and think of themselves as a Chapter. Also I realise it might read like they're the reason the Great Rift happens but it was meant to be that it's purely coincidental and the reason why the Aspects made their move. C&C is most welcome:
The Blood Diviners were a Loyalist chapter that was assigned the home planet of Quartos on the far reaches of the Eastern Fringes. They continually called for reinforcements after fighting all manner of xenos and chaos incursions alone. Quartos’ population are still in a relative dark age, what we might see as the Bronze/Iron age today. This means that the chapters has become very tribal, spiritualistic and superstitious. Due to the nature of their training and upbringing where only the strong survive together, they’re all very tight-knit. They do not have rivalries outside of friendly rivalries which are quashed on the battlefield. There is no backstabbing in the Chapter, only actions which benefit the group and because of this they operate very efficiently.
Instead of Librarians they have Shamans. Shamans are outcasts not out of fear but because they’re training is done separately, they’re very secretive about what they do. Shamans are held in very high regard and almost worshipped out of respect for their power. They commune with the world spirits especially to the 4 Aspects of the planet. All Marines in the Blood Divner are able to drink enemy blood and see small glimpses of possible futures and Shamans can see Large chunks of possible futures after drinking the blood of enemies due to their unique training.
The Blood Diviners worship the aspects of their home planet: the Wolf, the Toad, the Raven and the Serpent. These aspects manifest in many different ways with each having their own shrone on the planet as well as marines creating shrines on their ships, transports and with runic symbols on their armour and weapons.
The longer the Blood Diviners were left without reinforcements or any word for outside Imperial faction meaning that they increasingly became disenfranchised with the Imperium but they continued to fight for the systems they protect. The chapter was besieged on all sides by a large Ork Waagh and with no other options they turned to the Blood Angels. They sent an envoy to beseech them to give them aid; Reinforcements, arms, armour or anything of any use. They had few men left and were running low on all supplies. The envoy was turned away before even getting a council with Dante and was told they had no time for those not of the Sanguinius bloodline due to the encroaching Tyranids. The usually calm Chapter Master was furious that they had been passed over and abandoned once again, cursed the Blood Angels.
The Shamans came down from the mountains and called a Chapter wide meeting to commune with the world spirits. The Aspects of the world would mostly whisper to the Shamans, offering advice or visions, now they were offering a deal: Denounce the Imperium and the Emperor, join them and they will remove the Ork Invasion and give them strength. All surviving members of the chapter voted unanimously to join the Aspects, as the decision was obvious. They’d worshipped the Aspects for as long as any of them could remember, had been given boons of strength, knowledge and foresight. In a blinding flash the Ork invasion disappeared and in its place a spreading dark mass across the sky. The Eye of Terror had expanded, the Aspects of the world had their power increased tenfold and had destroyed the Orks instantly.
Given their new strength and pact, the Chapter started to amass recruits. They were quickly running out of arms and armour so they turned their attention to a nearby Forgeworld that had supplied them until it had heard of the dismissal by the Blood Angels. After a lightning fast raid the Blood Diviners took the Forgeworld and with knowledge from the Raven and the Wolf, the Chapter’s Techmarines started work on making arms and armour as well as more devious designs. With their supply lines secured they began raiding and expanding their empire. They do not directly worship Chaos but they do worship the 4 aspects of the planets, which are Greater Daemons that were bound there.
Some time after the Rift opens, the Blood Diviners have taken over the majority of a sector with very little resistance, crushing those who try to stop them and converting those who do not. Out of the dark a ship arrives from across the rift. Rather than destroy them outright the Chapter Master decides to hold a parlay. The ramp open and outsteps very large marines with the same livery as the Blood Diviners. They’re hideously mutated but still coherent to tell their tale. They had been sent by Guilliman to reinforce the Blood Diviners as they had sent out many calls for reinforcement before the Rift opened. The Primaris marines inside had been stuck in the rift for 100s of years having to succumb and make a pact with the daemons that infested their ship after their Gellar field failed. This was clearly a gift from the World Spirits and with these fresh recruits the Blood Diviners decide to push their raids even further into the new Dark Imperium