The Runewarden's Seal
Alignment rings puzzle
Medium
By
Bookwyrm
A carved stone seal of three rune rings, geared against each other.
A disc of grey stone the width of a shield is set into the vault floor. Three rings of runes turn within it, each with one rune inlaid in silver. The middle ring is caught between two stone cogs, one from each side.
The stone rings grind as they turn. Press the keystone when you think the runes are set.