In the aftermath of the Legion Wars, which all but consumed the Emperor's Children in an orgy of internecine slaughter, the Lord Commander Eidolon set himself to the task of rebuilding what remained. He re-established the Legion's ancient seat at Canticle City upon the world of Harmony, took up the grandiose title of Lord Commander Primus, and summoned the masters of the more powerful surviving warbands to treat with him. From this gathering was born the Phoenix Conclave.
Eidolon claimed to act upon a vision in which Fulgrim himself appeared and charged him to gather those sons of the Third Legion who still hungered for perfection. To that end the Conclave labours toward a single dark purpose: to reunify the scattered Emperor's Children and prepare the way for their primarch's return. Eidolon has come to believe that perfection can only be reforged from ruin, and so the Conclave spreads entropy and excess across the stars, unmaking the works of others in the conviction that something flawless will rise from the ashes. In secret he has bound the alliance to Abaddon the Despoiler, and the warbands of the Conclave ride out from the Eye of Terror amid the Warmaster's Black Crusades, indulging their cruelties upon a galaxy that once cast them down.
Emperor's Children
Order of battle
The The Phoenix Conclave field the units of the Emperor's Children — a detachment from the roster:
Kindred formations
Other Emperor's Children formations
Cohors NasicaeThe Cohors Nasicae is the personal warband of Lucius the Eternal, a mercurial and ever-shifting host of Slaaneshi Heretic Astartes bound to the galaxy's most infamous swordsman. Its ranks swell and dwindle at their master's whim as he leads them from one exquisite bloodletting to the next, forever hunting the finest opponents the galaxy can offer.
The Flawless HostThe Flawless Host style themselves the truest inheritors of the Legion's founding ideal, insisting that they alone have achieved genuine perfection while their kin merely wallow in indulgence. Cold, arrogant, and unnervingly serene, they wage war with immaculate precision, treating every battle as a demonstration of their supposed flawlessness. Their contempt extends even to fellow servants of Slaanesh, whom they regard as unfinished works.
The Kakophoni ChoirThe Kakophoni Choir are devotees of the sonic arts, warbands built around massed ranks of sound-weapon bearers who treat warfare as a grand and hideous concert. To them, the destruction wrought by their weapons is music, and each battle is a composition to be conducted with care. They seek out worlds famed for their acoustics or their populations, staging symphonies of annihilation for the pleasure of their god.
The ScourgedThe Scourged are among the most extreme of the Emperor's Children, warriors who have driven the pursuit of sensation so far that pain and pleasure have become indistinguishable to them. They mutilate themselves and their captives in elaborate rituals, wearing their scars as trophies and works of art. In battle they hurl themselves at the enemy with reckless abandon, hungry for the exquisite agony of the fray.