"Not that much," she says. "But the spell that wards off pirates from Winding Circle is a wire net with bits of mirror, buried outside the walls. When the mages bring the spells up, anyone who walks over them falls over dreaming. I don't know how to build that spell, but Spruce had me help repair a little bit of it once. I bet you could put spells in braided wire the way there's spells in that net, but I don't know how yet."