The Obelisk Gate, chapters 15 & 16
Nassun, Schaffa, and Umber visit the Antarctic Fulcrum and question the orogenes there about their lack of Guardians and why the orogenes are still alive. After some verbal fencing, Schaffa loses patience and kills the orogenes in the room. Nassun recognises a torus-slap and hand-breaking as things Essun learned from Fulcrum. After the killing, Nassun waits outside and is overcome by hatred. She uses the sapphire obelisk to turn all the orogenes to stone. There is some kind of stand-off between Schaffa and Umber.
On the way back, Nassun and Schaffa don't trust Umber, as Umber perhaps thinks Schaffa should have killed Nassun. The grey stone-eater (who represented Rennanis at Castrima six months and a chapter before). The stone eater offer to teach Nassun how to fight the thing controlling Schaffa. Umber agrees to not kill Nassun, despite her being very dangerous.
Hoa emerges in his stone-eater form, and is revealed as the stone-eater who was trapped in the garnet obelisk at Allia. They discuss whether either of them are "people". Hoa says he is protecting Essun from other stone-eaters. Essun and Hoa talk to Ykka, who has been talking down a lynch mob. Hoa says that some stone-eaters want to kill all humans. Ykka and Essun argue about the loyalty of the stills in Castrima
- Is Nassun a destructive and uncontrolled weapon, or a manipulated child? How could she atone for killing the orogenes in the Antarctic Fulcrum?
- The phrase "lynch mob": a deliberate reference to racial violence in the US, or a general turn of phrase?
- Essun's distrust of stills: a reasonable defence mechanism, or racism itself?
- What do us readers think of the revelation that much of what we see has been the result of a conflict between stone-eaters, and between stone-eaters and other factions?