Foundation-pattern plate, data included. Forged at the Gearforge, or found in Fractured dungeon chests.
Tier 3
everdune Beacon T3 Chest Master Table · about 0.03% per roll
Use it in a build
The planner works out what this item is actually worth to the abilities
you run — which attributes it feeds, whether its tagged rolls match anything you
have equipped, and how it compares against what is in that slot now.