The clerk
Found eggs. Useless alone.
Live pins have to meet. Start simple: a chain of three morphs into a box — that’s a save, not a blast. Harder Lab jobs need bigger assemblies, and the field widens with the job (Connect 4, then 5, then 6). Color is the family: cream four-pin, cyan straight, apricot corner, mint tee. They fall as they are. No turning. Overflow a column and the drill is over. Lab practice; the expedition stays put.