Complex sentence: However, the fact that a prophecy was written about Alex conflicts with the previous series because-if he is a descendant of Jennsen Rahl-he is pristinely ungifted and magic, including prophecy, cannot affect or be affected by him.
Split into simpler sentences: However, the fact that a prophecy was written about Alex conflicts with the previous series! If he is indeed a descendant of Jennsen Rahl, he would be "pristinely ungifted" therefor magic, including prophecy, could not affect him nor be affected by him.