Gray Corner Subplane, Ancient Sea Fortress.
This is the homeland, resting place, and main base of the Demon Hunters.
The ancient castle, mottled with age, stands atop lush green hills. The morning mist lingers among the trees, while Demon Hunter Apprentices are yelling and hacking at straw dummies in the castle's training ground.
The sunlight here is a bit peculiar.
A continuous layer of clouds blankets the sky, casting a gray net over the earth. When the sunlight penetrates the gray clouds, it cloaks the golden dawn with a muted gray sheen.
The Demon Hunters have grown accustomed to this unique light phenomenon in the Gray Corner Subplane.
Some are either in the alchemy room researching mutation inducers, others are drinking while swordfighting. Some are compiling thick monster manual at their desks, a few are lazily basking in the sun on the open-air terrace, enjoying the rare moments of leisure.