Third Legion, perfectionists of Fulgrim who pursued excellence until Slaanesh consumed them — now the kakophoni sing the galaxy into ruin.
Books
Ben CounterHorus Heresy
10 Dan AbnettHorus Heresy
Graham McNeillHorus Heresy
Various AuthorsHorus Heresy
10 Graham McNeillHorus Heresy
Various AuthorsHorus Heresy
Josh ReynoldsPrimarchs of Horus Heresy
Nick KymeThe Horus Heresy: Chronology
Various AuthorsThe Horus Heresy: Chronology
Nick KymeThe Horus Heresy: Chronology
Aaron Dembski-BowdenThe Horus Heresy: Chronology
Nick KymeThe Horus Heresy: Chronology