Complex sentence: After Weil is defeated, unable to escape, Zero supposedly becomes destroyed when the piece of the Ragnarok impacts to Earth, it is unknown whether or not zero himself is dead, for you only see his helmet half-buried in the sand.
Split into simpler sentences: After Weil is defeated, unable to escape, Zero supposedly becomes destroyed when the piece of the Ragnarok impacts to Earth. It is unknown whether or not zero himself is dead, for you only see his helmet half-buried in the sand.