Watching world firsts and have a barely tangible theory but I thought it was interesting
So far they objectives seem to only be Taken aspects of Riven - destroying the orb in its mouth, its eyes, and the attachments on its body as they fall down
What if either
[b]1.[/b] We [i]don't kill[/i] Riven, we just heal her from her Taken corruption and there indeed is another boss and its Savathun who was trying to use Riven as a puppet
or
[b]2.[/b] You heal Riven of her corruption, and that final bit of her health bar you can see thats segmented off is fighting her as a pure Ahamkara
I dunno its not that plausible but i thought it was cool
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Sounds like the first TOO boss from wow