Basalt and Blade

Oshuro is a pit of red mud and black glass, carved into an active volcano that keeps the endless ice age at bay. In the fighting terraces, survival is measured in razor-sharp obsidian. Tadashi is the best knapper in the crater, crafting thermal prism blades that slice through bone and stone alike. He cares nothing for the warlords squabbling over the heat vents—until an army of starving raiders breaches the rim, determined to seize the thermal core. To stop them, Tadashi must ignite the deep magma flues. Winning the siege means scorching half the terraces he calls home, and his neighbors would rather kill him than starve in the dark.