- Obtain the Ukonvasara or complete the appropriate Walk of Echoes Weapon Skill Trials and obtain the Shamash.
- Equip the Ukonvasara or Shamash and go to the Walk of Echoes. Talk to the ??? glowing on the floor to the far north with the weapon equipped.
- Need VW clears of three starter cities and completion of Guardian of the Void.
- Kupofried appears and offers you a choice of which weapon skill quest to complete. Select Great Axe, then trade your weapon to the glowing ??? to unlock the Ukko's Fury weapon skill and complete that weapon skill quest.