Original sentence: Aang is told that Sozin's Comet, which Fire Lord Sozin used as a power supply to start the war, will return in the coming summer, giving the Fire Nation enough power to ultimately accomplish victory.Aang travels to a Crescent Island in the Fire Nation after contacting Avatar Roku in the spirit world.For most of their journey to the North Pole, the group is pursued by Zuko, a banished Fire Nation prince and son of Fire Lord Ozai who is obsessed with capturing Aang in attempt to restore his lost honor since being banished and burned by his father for speaking out of turn.Roku tells Aang that he must master all four elements and end the war before this time.Upon instruction from Roku, he travels to the Crecent Island to a Fire-Sage temple wherein he contacts Roku on the solstice
Edited sentence: Aang travels to a Crescent Island in the Fire Nation after contacting Avatar Roku's dragon animal guide in the spirit world.Following the instruction from Roku's dragon, he travels to the Crecent Island to a Fire-Sage temple wherein he contacts Roku on the  winter solstice.For most of their journey to the North Pole, the group is pursued by Zuko, a banished Fire Nation prince and son of Fire Lord Ozai who is obsessed with capturing Aang in attempt to restore his lost honour since being banished and burned and scarred in one eye by his father during agni kai, literaly a fire duel, for speaking out of turn in a war meeting, and refusing to fight his father during agni kai.Roku tells Aang that he must master all four elements and end the war before summer, because Fire lord Ozai will end the war using Sozin's comet; an additional power source that makes fire benders even stronger.Sozins comet is named so as it was used by Ozai's Grandfather, named Sozin, to start the war, and deal a deadly first strike to the other nations