Feighd exhibit an astounding level of diversity. Some take on the appearance of children from any sapient race. Others appear barely distinct from monsters. Others yet take on plant- or water-like features. As a rule, they are all generally humanoid and very small in size: Lesser Feighd can be up to 3 inches tall while Greater Feighd can reach 7 inches. While faeries can shapeshift into larger forms or possess natural phenomena – such as trees and plants in the case of dryads – their true forms will always be in the aforementioned range.
Lesser Feighd childlike in appearance while Greater Feighd appear as adults. Some may have tails, wings, or more than two arms or none (if, for instance, wings replace their arms). Whether they have wings or not, all Feighd can fly though not all may choose to do so. Though capable of synchronising their lip movements to make it appear that they are speaking from their mouths, the speech of Feighd is strange and does not emanate from their throats. Instead, it reverberates through the very ether and may be perceived mentally, audially, or both.

While Feighd may appear to be either male or female, they do not reproduce or procreate physically, and so these appearances are purely aesthetic. The more powerful a Feighd is the closer to adulthood it appears and the bigger it is physically. Being creatures of pure magic, the Feighd have no fixed lifespan. So long as they have a source of magic, they are unlikely to die. They are born when a Greater Feighd of substantial power wills a Lesser Feighd into being. When a Feighd dies it simply explodes into magical dust. Feighd feed on magical energy alone, meaning that they can cannibalise one another unless socialised against it. Other things that produce magic - like a particularly pure spring or a well-cared-for forest or astralis lumen or even forces such as lightning or fire - are also a food source for them.

Feighd enjoy dancing and will do so both alone and in groups. While some Feighd are communal in nature and others solitary, they generally organise into loose or centralised clans, courts, princedoms, and kingdoms. They will usually obey the most powerful individual amongst them. The ultimate authority in the Feighd world, greater than the greatest princes or queens, is the Faerie High Queen Roisin Magnolia.

While their progenitor is in all ways kind, that is not universally true of Feighd, who were irremediably marked by the bileblood that corrupted their tree ancestors during the War of the Trees. They can be broadly separated into Malign Feighd, in whom the bileblood's effects are predominant, and Benign Feighd, in whom the bileblood's effects are present but subordinate to their ultimately kinder natures.

Through Glamour, Feighd can deceive the senses, create illusions, vanish, fly, shapeshift, move objects and fixtures, inflict disease, death, and curses, grant good health, healing, and other blessings, cast hexes and charms with the wave of a wand, as well as numerous other powers. Feighd have tremendous healing powers, having an intimate knowledge of herbs and being adept at using them to heal or undo the malign actions of others of their kind. They can use such magic to take away physical disability or to cripple and maim if they choose. Those who incur their ire may sometimes be lamed, paralysed, or rendered dumb. Less Benign Feighd may deploy their Glamour to make people believe that they are in grand homes or halls, that they have been offered delicate and delicious food, or that they have been given Feighd gold. What they will have really experienced is, respectively, a cave, some dung, or some dried leaves.

Even as their forms are highly changeable, their magical nature means they can also be quite insubstantial. By letting themselves become almost gaseous or melding into pure spirit, Feighd can float through the air with ease. They can go beyond this entirely and by means of Glamour become nigh impossible to see. Those who are busy with much more important things are unlikely to see a Feighd in its true form, and if they do will probably just catch sight of something out of the corner of their eye before losing it again. Most animals are much more alert and perceptive than sapient mortals and so are not as easily fooled by the Feighd. Dogs, cats, and horses will often become agitated by the presence of invisible Wee Folk. While Feighd are adept shapeshifters, the eagle-eyed observer may realise their truth by subtle hints and oddities that addle the Feighd form, for their Glamour is so potent that it can hardly be prevented from randomly doing fantastical, wondrous things. Such oddities may include, for instance, a spark of intelligence in the eyes of an animal that betrays it is truly of the Feighd. Feighd masquerading as other sapients may have exaggerated features or abnormalities, such as pointy ears, a long nose, club feet, or other such things not to be found in the given race. Through the Veil, Greater Feighd can use Glamour to hear the words that people are speaking even when they are distant and so avoid deceptively or invisibly wandering in the first place. Further assisting Greater Feighd is their ability to use Glamour as a means of transport from the Veil into the material world and back – Lesser Feighd can only travel to and from the material realm via locations of great magic, such as Feighd mounds. Bold mortals are able to tag along with a Feighd travelling by repeating the same spell. They may however end up in an unusual or unexpected place. As other races can sometimes eavesdrop on Feighd spells and so use them without permission, Feighd often seek to hide their magicks from them. When Feighd use spoken spells, they will be heard to utter fantastical magical phrases, such as “Horse and hattock”, “Abracadabra”, “Hocus pocus”, “Double double, toil and trouble!”, amongst other innumerable phrases. While Lesser Feighd say their spells, very little is needed for Greater Feighd to wield their magical power. Intention alone (perhaps combined with some spell recited in the head) is sufficient to achieve their purpose. A mortal affected by unspoken such magic may not be entirely sure whether magic is being used or whether it is simply coincidence - indeed, Feighd can sometimes be quite subtle with their curses and blessings.

Feighd cast magic in many ways. This includes songs, chants, spells, poetry, herbs, potions, and dances. Various items can be employed too – magical bows are frequently used to fire fae-shots that hold curses or blessings. They can also use wands and enchanted items to channel their powers. Uniquely, as they are beings of pure magic and Glamour, Feighd are in fact able to cast magick without wands and similar items that are otherwise necessary. An example of this is the Feighd ability to change things simply by blowing upon them. In some cases, the sheer presence of a faery, radiating an aura of Glamour, is enough to work magic, quite frequently subjecting those they have met or spoken with to inadvertent curses or blessings. Even though fairies are mostly deliberate when it comes to hexing and blessing, it is possible for them in this and other ways to cast magic unwittingly or unintentionally on mortals. Extremely powerful Greater Feighd may even be able to cast magicks from vast distances or even into the material realm without leaving the Veil.

Feighd can be Astral beings and can, by various means, be bound as a familiar. While it is possible to learn Glamour and All-magick without a Feighd familiar, such will be extremely difficult until knowledge of All-magick has become sufficiently widespread amongst other races.

Mortals can see through Feighd Glamour if they apply a special ointment to their eyes. This ointment, salve, or oil is made only by Feighd and with it mortal eyesight can penetrate Feighd Glamour and see things as they really are. It can also penetrate many spells and illusions, including those that cause invisibility. Such concoctions are necessary in cases where Feighd and mortals intermarry; the resultant hybrids are unable to naturally see Glamour and require the ointment to be applied to their eyes. The effects of the ointment can be undone by violent blinding, depriving the victim of their sight completely, or more mercifully by a Feighd breathing on the eye to return it to its original state. While they are powerful beings, a person with prudence can ward off Feighd and their trickery through various charms and wards. These have no power in and of themselves, but Feighd are obligated to respect their warding nature due to Roisin Magnolia’s decree. Minerals, plants, and animal matter that ward off Feighd include:

• Iron in any shape, whether a knife, a horseshoe, a pin or needle, pairs of tongs, or the bolt of a door.
• Amber beads sewn into a child’s clothes prevent Feighd abduction.
• Salt drives off Feighd.
• Adder stone, a naturally holed stone that can be worn around the neck to protect an individual can be hung to safeguard home or a stable. When not in use, the stones should be protected or may otherwise be stolen by Feighd.
• Buildings and large public fixtures such as wells can be protected by circling them with stones painted white.
• Sprigs of rowan repel Feighd.
• Vervain and dill can dispel evil influences, as can milkwort and mugwort. Other handy herbs are mistletoe, nightshade, yarrow, groundsel, rue, and the sap of Ash trees. Burnt bindweed is good for protection, as are four-leaf clovers.
• Sugar water, especially if served from a silver spoon or cup (or at least, from a receptacle containing silver) can help ensure that a mother and her newborn baby are safe from unwelcome Feighd attention.
• Even tea can drive Feighd away.
• An elder branch can guard against Feighd, and Elder springs can also be carried to ward them off or even strike them.
• Drawing blood from oneself, someone else, or any animal can drive off Feighd.
• A black cockerel is a good ward against the Feighd.
• Red threads tied around the throat, wrist, or into one’s hair.
• Holy items, such as artefacts created by gods, can act as a ward against Feighd.
• Some Feighd, particularly the sort with bad intentions, are unable to cross flowing water.
• This is not an exhaustive list, feel free to come up with your own! Ask me if unsure!