I see this with the name "Vakash, the Shadowed Inferno" and the line under that says "Shadowflame Suffused" in magenta text. I'm not sure if these weapons are always "Shadowflame Suffused" or only some of them.

From https://www.wowhead.com/guide/raids/amirdrassil-the-dreams-hope/loot#shadowflame-weapons I see:
Shadowflame Suffused - These three weapons have a special effect in which you have a chance to deal Shadowflame damage to both your target and yourself, with the damage severely increased if your target is above 90% health.

評論來自 sarahlogic

The damage proc from the 476ilvl version accounts for around 5-7% of my damage on my disc priest in 15-18 M+ dungeons. I am still optimizing my rotation for various affixes, so I will update if the overall number changes as my damage and ilvl increases.

評論來自 xLunacyx

A normal 476 on my 455 Dev Evoker was doing around 1.5-2% of my total damage in raid, a bit extra if there's some cleave adds. About 1% overall in a keystone.

評論來自 Adicus

Vakash was the reward from the run 5 Timewalking dungeons quest given by Kazra in Valdrakken.

I was pleasantly surprised as I had stayed up later than intended on a Monday night, in order to finish them prior to the Tuesday morning resets.

Boom . . .

(drops mace, and walks off stage . . . . then runs back and grabs it ;-)