Elemental Planes

Meanwhile, Argent and Gira land in the plane of ice. While there they meet another silver dragonborn, Cath who knows Argent’s father, an alchemist, and Malphaia. The three make their way to the plane of air via flying whale. They reach a floating city, where they speak with a jinn (?) who says he will help them get home if they fetch him a specific flower. They travel to the water plane, where they discover the flower is guarded by a turtle dragon. The party goes on a sidequest for the dragon (I think getting so many pounds of fish?) and at some point they wind up in a haunted town. Argent fails his saving throw and permanently ages a decade or so.

The party returns with the fish, and gets the flower, which is gifted to a whale by the jinn. They are also given a portal back.