You can now buy Splintered Spark of Shadowflame used to craft item level 447 gear with the Great Vault currency in Valdrakken.
With this week’s reset, Blizzard has added Splintered Spark of Shadowflame to Evantkis, the Great Vault vendor for 6 Aspects’ Token of Merit. This means you can combine it with the other spark from the weekly quest to create 1 Spark of Shadowflame, resulting in 1 piece of 447 gear every week.