The "spine," constructed from a blend of special alloy and rune stones, extends from the base of the sentinel towers, reminiscent of gigantic roots or perhaps a vast pipeline stretching from the Thundering Hills to the plains. The long-term erosion by wasteland magic power has left marks of time on this creation of civilization, where the once smooth alloy shell has turned rough and pitted, and the resilient rune stones blessed by the elements are also marked with mottles.
But the damage to the outer shell is merely superficial. Inside the "spine," ancient magical devices continue to operate faithfully, maintaining the normal functions of the sentinel tower—although the Silver Empire may have declined, the creations of the elves remain far more reliable than those of humans.
