The Rune Civilization has been anything but peaceful lately.

Just after the undead crisis subsided, a new threat emerged—a legion of Iron Skinned Men.

This legion, composed entirely of Iron Skinned Men, is impervious to blades, spears, water, and fire, making it easy for them to deal with other lifeforms.

From the Order, to the Human Kingdom, and then to the Minotaur Kingdom, all have suffered crushing defeats under the iron fists of the Iron Skinned Men.