A cold, high-gravity frontier world, 88 Tanstar hosts thin-aired plains broken only by inland seas and cavern holds where scattered survivors endure. Their resentment lingers from the Fall Narrow purge, when Cryptos infestation drew an orbital sterilisation that erased the first colony. Imperial power rests in orbit: the Ramilies-pattern fortress Tenebris Vigil, supported by Sword-class frigates and surface bastions like Fortress Tharsis. Though its people live in hardship and bitterness, the world’s value lies not in them but in its role as Navy stronghold and gateway to the Koronus Expanse. Fleet Anchorpoint: 22. Imperial Navy fleet of Calixis sector.
Ignis Aeternus WH 40K campaign notes 