Angels of Death - Season 1 Episode 7
The Honour of Angels

While Ancaeus surviving warriors follow Castias Servitors through the under-tunnels of Niades, the Tech-priest explains her plan to the paralysed Captain Orpheo. High above them, in the inner sanctum of the Siren Tower, the Genestealer Cults Magus tells her brood-kin the hour of their ascension is nigh.