The Ice Fortress, also known as the Ice Temple, is a large structure made entirely of ice, located deep within the Frozen Wasteland. It is the former lair of the Ice Dragon and the hiding place of the Shurikens of Ice.
When Master Wu, and the four ninja were searching for the four Golden Weapons, they traveled to the Ice Fortress on a ship. Within, they found the Shurikens of Ice shortly before the Ice Dragon attacked. Using the frozen Zane as an impromptu sled, they narrowly managed to escape with the Golden Weapon.
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