Location from The Locked Tomb by Tamsyn Muir
The Emperor's space station at the edge of the dominion — a floating fortress where God lives with his remaining Lyctors, waiting for the next Resurrection Beast to come and try to kill them all.
The Mithraeum is where the second book takes place — the Emperor's personal station, where he waits with his remaining Lyctors for Resurrection Beasts to arrive. The atmosphere is claustrophobic intimacy: a handful of immortals sharing space, nursing ten-thousand-year-old grudges, and trying not to think about the fact that the cosmic ghosts of murdered planets are hunting them. For Harrow, the Mithraeum is where she learns what Lyctorhood actually costs. For the reader, it's where the series pivots from murder mystery to cosmic horror — the revelation that the Emperor's empire is built on the bones of billions and sustained by the consumed souls of cavaliers.
A massive space station hanging in the void, constructed of necromantic engineering and imperial architecture. The interior is paradoxically domestic — living quarters, a kitchen, communal spaces — wedged into a military installation designed to fight cosmic horrors. It looks like someone built a house inside a battleship and then left God to rattle around in it with his increasingly dysfunctional immortal family.
Also known as: The Mithraeum, The Emperor's Station