Retrieve Hauteur's Ashes and then return them and the Ritual Torch to Temper at Emberglade on Azuremyst Isle. Remember that you can use the Orb of Returning to teleport back to Temper once you have the ashes.
The owlbeasts of Moonwing Den on Silvermyst Isle, far to the southwest, have been deluded into thinking that Hauteur is a god to be worshipped. What he truly is, is a fallen elemental who needs to be put out of his misery. That torch is the key to his downfall.
Hauteur regularly demands that these owlbeasts burn an effigy in his honor. So, when you light it, he will come. Slay him and bring me the ashes. Then use the orb in the satchel that I will give you to return to me here.
Do not speak to me again until you have Hauteur's ashes.
It is a valuable lesson that you learn here today. It is the story of endings and new beginnings.
When first we spoke I told you that fire was not just destruction, but also a renewing force of the elements. Through your actions you have both destroyed and saved Hauteur, for he shall be reborn from his ashes.