Shadar-kai

Shadar-kai are a Dungeons & Dragons creature where you really have to specify what edition you're talking about. Both versions have a gothy sadomasochistic theme (Imagine a whole race of Cenobites from Hellraiser), but the difference between 3e and 4e really couldn't be much greater.

In 3rd Edition

An obscure beastie, the 3.5 shadar-kai is a species of Fae that has been dwelling on the Plane of Shadow for generations. This has caused them to suffer a magical affliction where they steadily fade away into nothingness, unless they can stimulate themselves. The most easy way to do this is via torture and self-mutilation, to the point that their iconic gear are arm-bands with cold iron spikes on the inside, which they drive into their own flesh to keep them "anchored" into reality. They hate all mortals for not having to put up with the same effect, blaming them for their choice to live in the Plane of Shadow in the first place.

In 4th Edition

They became a humanoid race and a playable species. Basically, they're the descendants of humans who migrated to the Shadowfell in pursuit of immortality. They got it... of a sort. If they can keep themselves active, amused and interested in life, they can live forever. If they succumb to ennui, they start fading out of existence. Their culture is thusly dedicated to stimulation in all sorts; carnal experimentation, sadomasochism, boasting contests, athletic contests... in essence, they're a race of "live for the moment" loudmouthed jocks, with a tendency to cut themselves when things get boring.

Ability Scores: +2 Dexterity; +2 Intelligence or +2 Wisdom

Size: Medium

Speed: 6 Squares

Vision: Low-light

Languages: Common, one language of choice

Skill Bonuses: +2 Acrobatics, +2 Stealth

Shadow Jaunt: Shadow Jaunt can be used as an encounter power

Shadow Origin: Considered a shadow creature for the purpose of effects that relate to creature origin

Winterkin: +1 racial bonus to Fortitude defense, +2 racial bonus to death/unconscious saving throws