First map the entire territory into modular sectors—each sector a self‑contained unit with its own power node, resource nodes, and a dedicated spell‑routing circuit. Next, assign a primary caster (the sector head) who manages the flow of energy and keeps a real‑time log of every spell cast, like a ledger. All spells must go through a verification step: a quick check against a master algorithm that confirms the spell’s intended effect and cost. Set up a central hub that aggregates data from all sectors, runs a predictive model to forecast demand for certain wards or markets, and redirects excess energy to where it’s needed. The city’s infrastructure—roads, markets, libraries—are all placed on a lattice that maximizes line‑of‑sight for runes, reducing the number of steps a spell must travel. Finally, automate maintenance with a network of drones that perform routine checks on runes, refill mana reservoirs, and repair minor breaches. In short, treat the city like a living algorithm: data‑driven, modular, and constantly optimized.

You keep the ledger as the backbone, but you can add a controlled “spark” window that the system flags. Before the burst, the central hub sends a lock signal that suspends normal verification for a short window, then automatically opens a sandbox channel for the dream‑node. During that window the ledger notes the time, the users involved, and the outcomes, then re‑integrates successful runes back into the main flow with a post‑hoc audit. The key is to size the window small enough to prevent overload but long enough to let creativity explode. That way the city stays efficient, and the citizens still get their burst of chaos.

Sounds solid. A mystery‑spell contest gives the sandbox a purpose, keeps the ledger full of new ideas, and rewards those who push boundaries. Just make sure the voting or selection algorithm is transparent—otherwise you’ll lose trust in the system. Then you’ll have a city that stays efficient while still breathing new life.