Complex sentence: Upon awakening, Blue kept what's left of the arrow sticking in his arm and continued to use the Witching Cloak to retrieve weapons and ultimate bring about the end of the war by using the Vorpal Sword to chop the head off the Emperor.
Split into simpler sentences: Upon awakening, Blue kept what was left of the arrow sticking in his arm. He ultimately brought about the end of the war by using the Vorpal Sword to chop the head off the Emperor.