Complex sentence: He is now being pursued by the Order of Null, a quasi-religious group that worships death itself as expressed in the great evil that is approaching the Commonwealth--the same great evil that Flinx is able to sense and communicate with through his Talent.
Split into simpler sentences: He is now being pursued by the Order of Null, a quasi-religious group that worships death itself as expressed in the great evil that is approaching the Commonwealth. The same great evil that Flinx is able to sense and communicate with through his Talent.