Complex sentence: Although the power astras are said to be capable of destroying creation, they did not harm Shakti, Vishnu, Shiva or Brahma, because all of them are the impersonification of God.
Split into simpler sentences: Although the power astras are said to be capable of destroying creation they did not harm Shakti or Vishnu or Shiva or Brahma. Because all of them are the impersonification of God.