From the Records of Ignys Byr, Leader of the Arbiters:
The Feyforged are a unique people, so similar to us but so alien all in the same breath. Their connection to the elements of nature is unprecedented and unheard. When the original six arrived to aid us in the fight against evil during the Last War, the Principle was caught off guard. They did not know whether to welcome them or be cautious.
However, many now dwell within the ranks of the Arbiters, and I have yet to encounter any in our clashes with the Deceivers – although I am sure that Leydgrym and the Lord of Blades would only be too happy to have some within their ranks. The feyforged are a goodly people, a lesson of what we could become.
Children of Artifice, Children of Arcana
The feyforged are an enigma to most of Eberron, with few elves or practitioners of fey magic knowing just how they came to be. Traditionally, almost no warforged could form a bond with the elements due to their nature of assembly, but in the midst of the Last War, a group of six emerged from across Khorvaire to aid the fight for salvation.
Since then, small communities have appeared in these separate corners of the world some coming from across the seas in Xen’Drik while others dwell deep within the earth. All that can be truly agreed on is that the massive power these warforged wield is unlike anything scholars have seen across all of time.
Even draconic scholars on Argonnessen are confused as to the origin and birth of these individuals, for it does not even appear within their prophecies. However, to many average citizens of the world, they are welcome sights in their cities and towns – bringers of aid and good omens.
- from the publisher's blurb