Linking Volume Between Two Tracks

I’m trying to link the volume between two tracks so that the secondary track (which is just a flat tone) will mirror the volume of the primary one (which is dialogue). Basically, I’m trying to perform Auto-Duck but in reverse so the tone will be boosted when the dialogue is at its loudest. I can do this with the Envelope tool but it’s incredibly time consuming.

Is there any way to tie the volume of one track to the volume of another?

Steve’s dynamic-mirror plugin will follow, (a/k/a mirror), or duck.