Caloric Stone

Caloric Stone is a World Class Item once under the possession of Ainz Ooal Gown.

Description
This World Item is unique in which it can be obtained in various ways. One is by mining a special mineral from the Seven Hidden Mines. In addition certain requirements need to be met, such as by gathering vast quantities of the prismatic ores and then expending them.

Deep within the Azerlisia Mountains there are also mine deposits of caloric stones and are used by the dwarves primarily as a heating source, illumination, cooking etc. as an alternative substitute to using wood and coal.

Abilities
The Caloric Stone has multiple uses, from being used as a golem's core to enhancing weapons or even armor.

Trivia

 * It is still not clear if the Caloric Stones in the Azerlisia Mountains and the World Class Item used in YGGDRASIL are one of the same.