Justice Light's crawler class, built entirely around designing, hiding, and controlling trap systems.
Trap Master is the class Justice Light ran during his crawl, reaching top level 86 before taking the deal at the start of the eleventh floor. Its capabilities are on full display underground: he built an entire tunnel defense network in a week, layered eight traps in a single room where an expert changeling could only spot six, and armed or disarmed the whole array by touching hidden wall panels.
The class is what earned him the trap store during his Indentureship and, ultimately, the authorship of the eighth edition of the Dungeon Anarchist's Cookbook. It is also the tool behind Justice Light's Special Project — the design he claims can let a changeling touch a god and live.
The class discipline underpinning Justice Light's tunnel defenses and his secret design.