Necropoli-

A world shroud in a perpetual gloom, the thick cloud cover denies the brilliance of the dual suns to bath the world in anything more than a dull ultra-violet light. When night falls, the sky is so dark it seems abyssal in nature. 

Many creatures reside on Necropoli, however their bodies are adapted to the unique conditions of this world’s day/night cycle. The trees here have grown weirdly wicked, absorbing the ultra violet light. There are deep methane lakes while also granting the vast oceans of salty-acidic water. Fresh drinking water is a very precious commodity and is the leading source of economic wealth here. 

The world has earth-type gravity and while there is oxygen, it is similar to the oxygen found on mountains 28,000 feet tall. Causing burning in the lungs of those not wearing respirators or not born of this world. World wide electrical storms sweep across the skies on month long cycles. 

Magic and technology have developed here but are distinct and separate, unable to mix. Neither is inherently stronger than the other.