Everto de Ivalice
These devices of the Ancient Civilization were built with one express purpose: to contain and utilize the power of the “Holy Stones” or Auracite. The Lucavi were contained and their immense powers put to good use thanks to the Ancient Engineers. Each of the Makhanakalia, or “Machine Cells”, serve a different purpose.
The Lucavi stones have since been removed, rendering the Makhanakalia useless. They have instead been used to power great furnace of Gauge Machine city to provide steam to power the machines of the city. Thus eliminating the need to burn peat, eliminating the great cloud of smog which used to constantly blanket the city.