Regression Totem!
It was what Gehera had created in her Ruin of Amagoth after stealing the Regression System fragment's power.
Currently, it was gradually breaking down after absorbing the power of regression flowing into Stencil. It would at most last for a few more minutes. Before that, a solution had to be created for Stencil's survival.
Gehera didn't have the confidence in creating another Regression Totem even if Compass Carburettor allowed her the means to steal it. Her mental state was at rock bottom. And she was aware that she wouldn't obtain her father's support once again.
So, in her weakened state, stealing even a fraction of a Regression System fragment's power was impossible.