Cistern

"Trains a selection of creature units."

- Tooltip

The Cistern is an advanced military structure of the Sheikah Cadre which allows them to train a variety of demonic units.

Description
A well that descends deep into the earth, from which the Sheikah ritually pour their crimes and sins into. All many of dark and shadowy beasts can be summoned from these Cisterns.

Trivia

 * The Cistern draws inspiration from a number of dungeons, primarily the Bottom of the Well from The Legend of Zelda: Ocarina of Time, and the Ancient Cistern from The Legend of Zelda: Skyward Sword. Both dungeons are cisterns containing corrupt and demonic influence at their deepest point.