The Seyan'Du are an ancient race of powerful beings that disappeared long ago. No one knows for sure what happened. All that is known is that these beings were very powerful warriors. They built the Labyrinths as tests for anyone who wanted to become a Seyan'Du.
Upon completion of the Labyrinths and the defeat of the Gatekeeper, you will become a Seyan'Du. Your skills will ALL max out at 90. You will receive every skill in the game, except for War Cry and Concentrate.