Using the Stigma Refinement Workbench allows you to craft Stigma Enchantment Stones.

Craft a box using [Event] Stigma Refining Fragments.

Player: Try refining.

Crafting a Stigma Enchantment Stone requires 1 [Event] Stigma Refining Fragment.

Player: Place 1 [Event] Stigma Refining Fragment.

Hammer the heated Stigma Refining Fragment.

Player: Hammer the Stigma Refining Fragment.

15 Stigma Enchantment Stones have been crafted from the Stigma Refining Fragment.