Board Thread:Speculation House/@comment-1292715-20181223044830/@comment-26018514-20190326164456

Sentry 616 wrote: About the only reason I see her wanting Ruby is as a hostage, as I don't see any other way that having an SEW prisoner would help Salem, but even that seems questionable. Personally I think she see's Ruby as a potential surgeon.

We know;

1. It was never indicated she got power from the pools of destruction, only a bad attitude, pain, and a facelift.

2. SEW powers destroy/decimate turn Grimm to stone

3. Grimm pretty much are pool of destruction Solidified

4. Salem can reform from pretty much nothing

5. Cinder can control Grimm inside her body without a dip in the pool of destruction(unless Salem dipped her in GoL's pool first or something too).

We can then infer that Ruby might represent something like a Bikini-wax to her, a painful procedure, but one that would relieve pain afterwards and remove unwanted irritation.