|This article is about The Keystone of the Bloodstones. For The Mesmer skill, see Keystone Signet.|
The Keystone is one of five Bloodstones through which the Gods of Tyria forever shattered magic in the world of Tyria over 1000 years ago. The Keystone is the piece required to assemble the other four.
For more information and background, read the Bloodstone article.