It's not a weapon, or a creature, or a person, or a group of people, or a place. It's just ... stuff.
“This is a timeline of all the events in the Tunnels series. Hundreds of millions of years ago...Timeline of Series's Events
“New London Ale is a drink sold in the bars of the Colony, most commonly in the Rookeries. New...New London Ale
“The Book of Proliferation is an ancient Styx book similar to The Book of Catastrophes, but...Book of Proliferation
“The Russian Submarine was a nuclear submarine operated by Soviet Russia during the Cold War...Russian Submarine