Complex sentence: This is due to the ruthless manner in which he pursue the Azran's legacy, blindly believing it to be a blessing for the humanity: it is not until it is too late that he realises that he has made a horrific mistake.
Split into simpler sentences: This is due to the ruthless manner in which he pursue the Azran's legacy, blindly believing it to be a blessing for the humanity. It is not until it is too late that he realizes he has made a horrific mistake.