Travel to the Old Kingdom

The player gets this quest automatically after repairing the ferry in Wimblewick.

Task
"Now to head across the island and find out more about the Old Kingdom."

Speak with Rex at the Wimblewick docks to travel to Radiant Sands. Go to the Cloud Catcher - a structure west from the ferry. A cutscene with Aaerie will play. She will send you to locate the Wizard in the Radiant Sands.