Hmmm. Reread the last journal entry in the basement. She says she's taking her ring to Baldur's to show what it can do. It is implied that the ring is based on her research.
So, perhaps there is something to it being used to keep the tadpole in stasis. Maybe she went to Baldur's, there was treachery and betrayal, and the Sussur research, ring and all, was taken and used.
Ah, but it's clear it's shadow magic, not anti magic. I keep going back to that.
That's one of the problems I'm having overall trying to figure this all out.
There are so many players. How to piece it all together?
A. Illithids,
B. devils,
C. githyanki,
D. vampire,
E. the dead three,
F. the Absolute,
G. the clerics of Mystra,
H. the Necromancy of Thay,
I. Shar,
J. Selune,
K. Ketheric,
L. Eilistraee,
M. Lloth,
N. Zariel,
O. the Unclaimed,
P. Ironhand gnomes
Q. tadpole versus dream figure
*
I feel sure that this is a vital piece of the puzzle though. The Sussur flower research has to be important. It's the flower powering the entire tower, and there are broken bits of machinery everywhere.
And it all has something to do with a ring going to a meeting of Mystra clerics.
