Oathward of the Bridge
A colossal Magi-Tech warden of the Aegisan Custodia, bound to the dual function of the Bridge of the Eternals: controlled passage across the chasm, and energy stabilizer for Nexus Prime. It answers breached oaths and unstable Nexus flow. It is no invisible toll: the Oathward is the bridge's controlled passage made manifest. It holds the bridge as a chosen oath, not as a command.