Craig

To put it bluntly, the sluagh had never been warmly welcomed by other fae. They found them eerie (and by their standards that said quite a lot), and frankly just plain weird. Untrustworthy, even. Always lurking in the shadows with their seemingly endless amount of knowledge about everything, and everyone; it's often said there's no such thing as a true secret because, somehow, some sluagh always seemed to know about it, and in full detail. To make it worse, they were the nightmare fae.

They were the faeries capable of creating the dreadful magic draining beasts that plagued the minds of mortals and fae alike, filling others heads with endless amounts of horrible thoughts and images and feeding off the fear that ensued. They were equally capable of bending their form to match their terrifying creativity, allowing them to manipulate others regardless of if they were awake or fast asleep. Though the sluagh typically didn't target other fae (unless they were provoked, which some found as a past time, especially trolls), that didn't make them any less frightful, and for that the other fae despised them. For centuries they waited for a golden opportunity to arise, so they could rid themselves of the sluagh once and for all. Eventually, it happened.

The details of the sluagh damnation are blurry at best; those who know what took place rarely speak of it (presumably due to fear), and it's unknown if the sluagh know the true history of it or not as they never divulge anything to an 'outsider' of their kith. All that is publicly known about the ordeal is that many of them were slaughtering and the rest were given an unbreakable curse, then exiled to the abandoned undergrounds in the realms outskirts.

It's rare, these days to see a sluagh in the rest of the faerie world, though when one does they're typically avoided if possible. Whatever happened in the days of old, happened because of fear and, now, they are more feared than ever before.