The Lorekeeper's Tome

If the Kobold Miner digs the warren, the Kobold Trapper makes it lethal. These are the cunning ones, the engineers of the tunnels, rigging deadfalls and spring-spikes and pit-traps with a craft that belies their feeble bodies. A Trapper rarely fights directly; it lures, it leads pursuers down the prepared corridor, and it springs the trap from safety. A party that kills the Trappers early walks a kobold warren in relative safety. A party that does not learns the warren the hard way, one snare at a time.