Aspect of Mending Stone is a Druid Defensive Aspect that can be found by completing the Sealed Archives Dungeon as well as from random enemy drops. After clearing the Dungeon for the first time the Aspect will be available in your Codex of Power.
How to Obtain - Codex of Power - Sealed Archives
Aspect of Mending Stone Mechanics
Legendary Aspects can change the way skills and builds work in significant ways.
Earthen Bulwark
Barrier
For further information, see our Build Guides, Legendary Aspects & Codex of Power
Aspect of Mending Stone