The Inner Circle Knights Cenobium were a specialist formation unique to the Dark Angels Space Marine Legion during the Great Crusade and the Horus Heresy eras. These elite warriors were chosen from the various Orders of the Hexagrammaton by their Primarch Lion El'Jonson to form a temporary unit gathered together using a cell of warriors from one of these Orders on the even of a mission that required their unique skills. They were clad in formidable Cataphractii Pattern Terminator Armour and armed with deadly Plasma-Casters and Terranic Greatswords. Arrayed in the I Legion's finest wargear, these temporary squads could bring the wrath of the Lion directly into the heart of the enemy.
Amongst the ranks of the I Legion stood the formidable warriors of the Inner Circle Knights Cenobium. Only the most dedicated warrior-adepts of the Legion could attain the rank of Cenobite and were granted the right to bear the cipher of one of the Orders of the Dark Angels. Clad in the finest Cataphractii Pattern Terminator Armour they are covered in the symbols and heraldry of the I Legion. The Cenobites of the Inner Circle could easily weather the storm of shrapnel and flame produced by the terrible weapons of the Great Crusade with limited risk. Armed with the best weapons that the Legion could provide, they would bring the fury of their assault into the heart of enemy fortifications. These temporary squads are all armed with a Terranic Greatsword and a Plasma-Caster, the latter weapon that's unique to the Dark Angels and is a smaller version of regular Plasma Weaponry, fitted into the vambrace to allow the Inner Circle Knights to fight unencumbered in combat.