The Nether Reaches is an underground complex of caves. It was once open to the surface world, but became sealed off after a tectonic shift. The caverns are luminous, with a faint green glow. Netherdrakes, including Viper, have inhabited the Nether Reaches for millions of years since their race was trapped inside. Despite being sealed, rumors exist of a secret passage deep in the abyss "between the realms" that lead back into the Nether Reaches, and Viper is searching for it.
Pugna also derives his powers from the Nether Reaches.