Complex sentence: When Allanon comes to Shady Vale seeking Brin's help against the Mord Wraiths, Rone argues against it, but when Brin decides to go, Rone comes along as her protector.
Split into simpler sentences: When Allanon comes to Shady Vale seeking Brin's help against the Mord Wraiths, Rone argues against it. When Brin decides to go, Rone comes along as her protector.