-- Tom Stoppard, Rosencrantz and Guildenstern are Dead
Unlike the selective, restrictive Seelie Court, the UnSeelie Court welcomes anyone and everything with even a drop of ancestral Fae blood. Fae can and do breed with anything, creating odd, mixed creatures. Most species consider the offspring grotesque monsters. The mutant creatures gravitate towards the UnSeelie Court, which welcomes them and gives them an environment where peculiar physiologies and abilities are the norm.
The UnSeelie Court is a more hospitable place for non-fae as well. Court nobles eagerly provide patronage for creatures who are extremely strong, dexterous, clever, beautiful, or talented. Obtaining the sponsorship of a court noble is not without its rewards, nor without its dangers. For instance, a gifted bard whose playing impresses a Fae nobleman might be invited to his castle as a guest. Once there, the bard will be feted and asked to play every night -- and never be permitted to leave.
Ruling over all these oddities is the Queen of Air and Darkness: a Fae of unsurpassed beauty and grace. The Queen of Air and Darkness has no current consort and no surviving children. The court is rife with gossip and political maneuvering as each noble curries the queen's favor in the hopes of being named the royal heir.
Outsiders not of Fae blood are rarely admitted to the UnSeelie Court. Visitors must be prepared with unusual and powerful gifts for the Queen, or they might find themselves the quarry of a nightmarish hunt. Suitable gifts for the Queen include figurines of horrific power, gems of darkness, and cursed jewelry.
After a millennia of indiscriminate breeding, the physical appearance of the UnSeelie Court mirrors the macabre. Twisted columns, trees forced into unnatural growth by royal gardeners, are scattered haphazardly through the hall. Curtains of shadows hide blood-soaked alcoves. Drawn back for times of celebration, the gaping crevasses reveal uninvited guests captured for the amusement of the court. Riotous blooms of nightshades and blood red roses glow in the evening, providing a maddening light to the misshapen court.
The throne of the UnSeelie Court is shaped like a great shadow dragon, a creature of midnight and darkness, like the queen herself.