|Founding||Outside of any established Founding|
|Successors of||Dark Angels|
|Chapter Master||Grand Master Nakir|
|Homeworld||Fleet-Based, Fortess-Monastery: Reliquaria|
|Strength||Largely the same as the Dark Angels, but boosted by ancient relics, archaeotech, and other superior wargear|
|Specialty||Relics & Archaeotech|
|Allegiance||Imperium of Man|
|Colours||Black with Red Stripes/ Old Dark Angels legion colors|
The Consecrators are a Chapter of Space Marines descended from the Dark Angels. As with many Chapters nowadays, their Founding is unrecorded and their early history totally unknown. Indeed, prior to the third century of the 40th millenium, there was absolutely no record of their existence. They just sorta appeared during the Second Kuppukin Schism, in which they annihilated the entire rebel force in only six hours before vanishing again. They were once again absent from recorded history until three decades later, when the Chapter's 4th company was seen fighting alongside the Dark Angels at the Arrulas Intervention.
In the eighth century of the 41st millennium, the chapter's entire 3rd company went missing in the Jericho Reach after being ambushed by Orks and forced to abandon their strike cruiser, essentially going behind enemy lines in an ongoing warzone. Forces from the Angels of Absolution and Angels of Redemption were tasked to find them, while the Deathwatch made it their job to find and cleanse the ork-salvaged hulk. It is not yet known in the fluff whether the 3rd company or their vessel have been found.
They appear to have inherited the most revered arms of the Dark Angels Legion, preserving them carefully through the ages. They bear a close resemblance to the Dark Angels before the Horus Heresy, maintaining the Legion's original black colour and exclusively wearing older patterns of power armour. This implies that the Chapter is either very old, or that the Dark Angels Inner Circle had them created specifically to retain the relics of the Legion... or the Dark Angels have so many relics and pieces of archeotech that they hand them out like candy to their Successors (Seeing how the Rock is full of archeotech factories (lucky bastards)). Or maybe it's time travel.
Or perhaps the Consecrators...are the Dark Angels.
This absence of knowledge of their existence by the greater Imperium does not appear to be extended to the rest of the Unforgiven, who do seem to have at least some knowledge of their history, purpose and current events. They were founded apparently in secret on the instigation of Supreme Grand Master Valafar on an undisclosed date, for the specific purpose of uncovering the mysteries of the Dark Angels' history. So we know this puts their inception at some point after the Second Founding and also most likely outside of any officially sanctioned founding as well.
Being one of the Unforgiven, the Consecrators share the Inner Circle, knowledge of the Fallen Angels, the Deathwing, the Ravenwing, etc. However, their Terminators are painted black with white helmets to signify the like to the Dark Angels First Company.
Deathwatch includes Consecrators as playable characters. To reflect the fact that they are equipped with such ancient and revered equipment, every character carries at least one master-crafted item as standard issue, though they don't have access to power armour newer than Mk.6 Corvus (although this is fine, as earlier marks of armour tend to have the best machine-spirits and traits).
Their current Chapter Master Nakir holds the Inner Circle honorific of Master of Souls and was an Interrogator-Chaplain prior to his appointment as Grand Master. He also holds a Heavenfall Blade: the "Sword of Sanctity" which was recovered after being lost by the Disciples of Caliban but Azrael let him keep it.
If the Dark Angels ever get a Supplement, it should focus on these guys. They're different enough from the other Unforgiven to actually be distinct, and (perhaps more importantly) they would give players an excuse to field Horus Heresy-era weapons like Volkite ray-guns, rad-weapons, and Horus Heresy-era Terminator armour from Forge World.