Founding: 1st (M30). No successors.

Primarch: Horus (Deceased)

Affiliation: Chaos Undivided

Original homeworld: Cthonia (destroyed)

Current homeworld: None

Organization: Originally known as the Luna Wolves. Renamed in honour of the great Warmaster. Widely regarded as the best Legion overall, with plenty of strengths and no particular weaknesses. Took the name Black Legion after Horus' death. The bulk of the BL now serves Abaddon the Despoiler (aka. Ezekiel the Just).