The Birthplace of Humanity
He sends you off to Pinnacle. It is the big City right next to the City of Light.
If you have wandered here before, this guard would have stopped you. But now the block is lifted and you may now enter.
Head to the quest marker in Pinnacle to find the King.
Speak to the King and tell him about the situation and lastly that you need to speak with Prince Syrion.