Ziggurat Passage

The Zigguratt Passage is a dungeon along the east coast of Hallowed Marsh. Once completed, it can be used as a shortcut from Hallowed Marsh to Enmerkar Forest and vice versa.

Passage Through
In order to be able to run through the passage, you will need to activate all of the levers on the Enmerkar Forest side of the dungeon. This area can be accessed by traveling from the Forest to Hallowed Marsh, or by passing through the basement of the Spire of Light (also requires solving a lever puzzle).

Jade Lich Idol
Placing the Jade-Lich Idol on the pedestal by the Enmerkar side entrance will create an iron bridge between the island and the rest of the Hallowed Marsh, and will also clear the Rancid water from the dungeon and replace it with Clean Water.

From the Enmerkar Forest side:
 * Head up the elevator on the right
 * Turn left and go past the Animated Skeleton, pull the lever at the end of the corridor
 * Return down the elevator
 * Head through the doorway on the opposite side of this area (left from entrance)
 * Turn left up the stairs and run past the Blade Dancer
 * Pull the lever to the left of the locked gate, then enter the now unlocked gate
 * Follow the path until you reach a sheer drop-off.
 * Either drop directly down, or walk along the pipe and land on the tree to the right if you don't want to lose any health
 * Pick up the Jade-Lich Idol off the ground near the Phytosaur
 * Return to the Enmerkar entrance of the dungeon and place idol on the pedestal

Enemies

 * 2x Animated Skeleton (Shield)
 * 2x Animated Skeleton (Iron Claymore)
 * 1x Blade Dancer
 * 2x Burning Man
 * 1x Phytosaur
 * 2x Tuanosaur

Unknown Arena
This location contains an end-game boss fight known as an Unknown Arena. See this article for more details.

Loot
Loot Containers:
 * 1x Adventurer’s Corpse
 * 3x Chest
 * 2x Junk Pile
 * 1x Knight’s Corpse
 * 1x Ornate Chest (in the middle of the dungeon on the top floor. Requires a lever in the middle to be pulled).
 * 1x Worker’s Corpse

Gatherables:
 * 2x Blood Mushroom
 * 3x Iron Vein
 * 1x Oil Node
 * 1x Palladium Vein
 * 2x Star Mushroom