The Drowned Kingdom

 is a location in.

Background
The Drowned Kingdom is an echo realm from the ancient past, inhabited by the Huana. It's crafted from the regrets of King Wingauro o Watūri I, the ruler of Ukaizo, who invited the Engwithans to build their animancy machines in the city, bringing about its downfall.

Points of interest

 * This is a fairly linear area, with a bit of a maze-like aspect to it. See the quest article for details on how to navigate the area. The entrances to Sunken Crown can only be navigated by using the conches to alter the water levels. To reach the isolated area in the northwest, you need to use the other exit to the Kingdom from the Sunken Crown, then use the conch to manipulate the water levels. This gives you the Current's Rush.

Loot

 * Current's Rush: In the hands of the sunken statue. Access available after passing through the portal in Sunken Crown and activating the conch.
 * The Twin Eels: the chest is in the southeastern corner of the The Sunken Crown. To lower the water, use only the first pedestal and then make your way to the Sunken Crown. See here for details