Complex sentence: In a sudden rage of self defence, he wrests the sword from Beleg and kills him.Turin takes Belegs sword which Turin himself dies upon in later years when life is too hard to bear.
Split into simpler sentences: In a sudden rage of self defence, he wrests the sword from Beleg and kills him. Túrin takes Beleg's sword which Túrin himself dies upon in later years when life is too hard to bear.