After noticing the eerie quiet he went to investigate what was going on only to find remnants of the damage you had caused he was still hopeful you could be reasoned with so he gave that a try only for you to slash him down on the spot instead at that moment he snapped realizing that despite the "so-called legend" you are nothing but a pathetic pawn in the game taking out your lack of freedom on those around you knowing he is the one thing standing between you and closing the fountain he decided that he may not be able to win instead he will lose and take you down with him.