Decided to solo the Dungeon since the game apparently didn't count my solo during shadowkeep. Get past the first encounter and during the traverse phase, Riven spoke to me and said...
"Instead of fighting the taken, why not become the taken" (in Zavala's voice)
It was odd because I've never heard that dialog after the many times I've ran that Dungeon only until this past reset.
[spoiler]I belive our next darkness abilty will be taken for sure[/spoiler]
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Guardian,Archon Of Light
Eliksni at Heart, Lover Of Eris Morn - old
Riven also calls us "Brother Slayer", meaning its Savathun speaking through Riven