They didn't. They were created سے طرف کی an accident. The ancients spread human life to a place with the Iratus bug. (Dunno if I spelled that right) The bug fed upon humans and laid their eggs with human DNA. Eventually they evolved into The Wraith.
posted پہلے زیادہ سے سال ایک
That is correct answer! :) Wraith is a byproduct of humans and that bugs DNA!