Álfheimr

The Álfheimr (also known as the Fae/Fey, Fair Folk, Fairies, or Elves; less kindly, the Invaders) are an extraterrestrial species currently laying seige to Hyperborea. Originally hailing from a dead, exosystem planet called Elfame, the Fey now scour the cosmos for the resources they need to survive and recreate their homeland. They operate from and live wholly upon their mothership, Avalon. Drawn to its magic aplenty, the Fey have occupied the heavens of Hyperborea for nearly a millennia, earning Avalon its reclassification as a "moon". (The Giants are the only race to refer to their craft as "the Moon," however.) They are governed by four rulers: Alberich, Oberon, and Titania, and Nimue. 

Fey are naturally skilled Sourcerers that need its presence to live; so long they have enough Source, the Fey are virtually immortal. Diverse, insect-like wings and legs, long, pointed ears, and ethereal, delicate features are shared across their species. Overall size and wing span can vary from individual to individual, with many—but not all—Fey being capable of flight. They are a bipedal, humanoid species with four long fingers (three digits, one thumb) and four prehensile toes. Fey possess "beady" stares; they lack corneas and irises seem to blend seamlessly into their pupils, with black being the most common hue. They have notably melodic, singsong speech patterns that carry a faint echo. The overall color palette of Fey is very woodsy, with notable pops of color being their wings and the vegetation growing upon them. As Fey age, they'll assimilate favored flora into their bodies; many modern Fey are an amalgamation of pilfered foliage from their variouts planetary conquests.

The home planet of the Fey, Elfame, was once saturated with magic produced by the Great Tree, Yggdrasill, yet when the tree suddenly began to wither, so too did the Fey begin to die out (they called this event Ragnarok). However, during its final days, Yggdrasill bore a single fruit, which the Fey now ferry the seeds of across space. The Fey are only aware of the fact that Yggdrasill needs Anima to thrive; beyond that, their motivations are only to endure and remake Elfame and better. Thus, they fashioned the fruit into a spacefaring vessel and began their intergalactic acquisition of magic and resources. It is not simply enough for the Fey to find a fitting planet—they want to make their own. The Fey intend to call the reborn Yggdrasill Mímameiðr and the new Elfame Ozma. 

Along with what they managed to keep from Elfame, the majority of Elven stores are preserved, Universe-wide specimens, magic, and Anima. The Fey will continue to target a planet until its Anima and/or other resources are fully depleted, the native life drives them away, or they lose interest and move on. Hyperborea is exceptional in that it seems to be a neverending font of Anima and lack of true opposition, hence their extended stay. Four seeds of the fruit husk used to create Avalon were used to create their attack ships: Dáinn, Dvalinn, Duneyrr and Duraþrór.

The Giants, Dwarves, and Ember Therion are united against the Fey. The persistent amicability of the Giants, advancing technology of the Dwarves, and fierce firepower of the Ember Therion has reduced Fey attacks to a minimum.