Complex sentence: Norrin Radd completes his creation of the new Universe, and so does Dawn Greenwood, but then the Shaper of Worlds says all Dawn has to do is choose the right Surfer from the real or duplicate, but she can't choose.
Split into simpler sentences: Norrin Radd completes his creation of the new Universe, and so does Dawn Greenwood. Then the Shaper of Worlds says all Dawn has to do is choose the right Surfer from the real or duplicate, but she can't choose.