Derse, also known as the Kingdom of Darkness, is one of the two kingdoms in the Incipisphere.
Derse is a shadow-cloaked violet city planet that orbits Skaia and is connected to its single moon by a large purple chain. Derse is ruled by the Black Queen, and the planet is inhabited by black-carapaced citizens who resemble black chess pieces.
The moon of Derse possesses a series of towers, one for each of the dream selves of roughly half of the players in any session. The other half of the dream selves reside in similar towers on the moon of Prospit. These towers contain rooms that very closely resemble the bedrooms of the players in their homeworld, except they are portrayed largely in a single color tone associated with the player. While Dersites are opposed to the players, there are rules against harming them before the war begins which Dersites have a natural instinct to follow. It has suggested that even if these rules are broken that attempting to harm them would be "tricky" suggesting some sort of defense.
The citizens of Derse have black carapaces and, by default, wear black and dark grey clothing.