Chapter 2378 The First Firewall employs a digital-age metaphor (firewall) within Echoes' stone-age narrative setting, creating productive anachronism. The title's collision-free status contrasts with earlier First- prefixed titles that collided — The First Firewall's specificity and contemporary resonance distinguish it from earlier abstract First- titles. The digital metaphor applied to a pre-technological society exploring new arts creates thematic friction that drives narrative tension.