Ghost Army

The was a brigade of moving stone soldiers that served the demon Mōryō. Being made of stone and seemingly to move on a ghostly will, they are invulnerable to conventional weapons and are difficult to stop.

Background
In the past, a clan of shinobi made a pact with the demon and tried to use his army to destroy the world and to create a. However, when the priestess Miroku sealed Mōryō away, the army was encased in stone within the shrine that their leader was sealed in.

Plot overview
When Yomi, a descendant of the shinobi clan, came to free Mōryō, it also released the Ghost Army. They trampled several villages on their way to the Land of Demons, but were ultimately defeated by Naruto Uzumaki, Kakashi Hatake, Shikamaru Nara, Might Guy and Temari.