You gotta layer it like a poem, stone after stone, each one a line that holds the next. Start with a core of basalt or reinforced concrete that can shrug off heat, then wrap it in a lattice of obsidian‑tough fibers that flex when a dragon exhales. Sprinkle in some copper strips that hum when wind hits them, turning the whole block into a verse of its own. That way the city doesn’t just survive the fire, it sings through it.