Complex sentence: In saving his companions from the Balrog, he falls into an abyss with it, battles with it, dies, and is restored to life by divine intervention, his robe is no longer gray but brilliant white.
Split into simpler sentences: In saving his companions from the Balrog, he falls into an abyss with it, battles with it, dies, and is restored to life by divine intervention. After his return, his robe is no longer gray but brilliant white.