Dave Arneson: Redoing DA3 City of the Gods (part 2)

 

Furthest from the settlement is a pair of giant openings known as the Great Caverns. They each slope gently up and inward to a narrow opening to an inner spherical cavern hundreds of feet in diameter. 

Further in on the opposite side of these caverns is a tunnel. These are the particle accelerators that feed the combustion chambers. They are fifty feet wide and lined with magnetic particle accelerator field magnets which are strong enough even shut down to pull metal to them, weapons, armour, objects, even iron from blood (-1 Constitution/round). These lead to the antimatter reactors of the ship.

In the ceiling of the spherical caverns is a smaller particle accelerator feed line for firing exotic particles into the antimatter for detonation.

Its highly radioactive here causing deformities and mutations on a save vs. deathray per round or die at -4 penalty.