Complex sentence: The ruler, Sultan Amhara, was killed in the battle for the capital city of Khaibar where he left behind one of the greatest treasure stores ever amassed, including the Cup and Talisman of Al'Akbar.
Split into simpler sentences: The ruler, Sultan Amhara, was killed in the battle for the capital city of Khaibar. He left behind one of the greatest treasure stores ever amassed, including the Cup and Talisman of Al'Akbar.