Harmonic Alloy

Harmonic Alloy is a crafting material used to add raid-exclusive traits to raid weapons. It is obtained by dismantling Vow of the Discipline raid weapons.

It is the raid counterpart to Resonant Alloy, which is obtained by dismantling weapons or completing certain activities and adds Masterwork-like bonuses to a weapon's frame. Crafting materials and their sources have changed across seasons, so check current patch notes before relying on this.