Pax nodded. "It's what keeps you going. It's nearly inexhaustible. You could go for centuries without wearing down. The people who made you probably had a plan to detonate you sometime later. But being destroyed accidentally isn't really an issue. To stabilize the nuclear energy running through your body, they had to make your endoskeleton out of the best metal money can buy. You're more or less invincible, unless someone hits you with a vortex grenade. But what I'm worried about is that somewhere in this city, there's a detonator. And whoever holds that is a very dangerous person. It's most likely one of the Monarch's men, and once they find out you've gone to us, well, there'd probably be no more Sewer."