After using an Elemental Skill, increases Normal and Charged Attack DMG by 8/10/12/14/16% for 12s. Max 2 stacks.
In Game Description
A grudge discovered in the Blackcliff Forge. The glimmers along the sharp edge are like stars in the night.
How to Get Prototype Starglitter?
Obtainable from forging. Here’s all materials you need to forge Prototype Starglitter: