Sure it says in the Myth manuel that a race called Callieach created the Devoid...but it also says this.
Pg. 47, Myth
Fifty years ago the Fallen overcame the armies of the Cath Bruig, sacked Muirthemne and turned the empire East of the Cloudspine into desert (now called the Devoid)
Pg. 46
Rather then be hunted to extinction by the Trow, the Callieach destroyed themselves and many Trow leaving behind only the Devoid.
So the desert that the Callieach created is called the Devoid but the actual crater is the Great Devoid...therefore my theory that the Great Devoid was created by the impact of the sleeping god in PID still stands.
(I was turned many a times because you all THOUGHT that the Great Devoid was created by that legendary race)
