Angels of Death (2021) 1x7

While Ancaeus' surviving warriors follow Castia's 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 Cult's Magus tells her brood-kin the hour of their ascension is nigh.