Who is the most extreme or edgy provider you have met?

The most extreme domme I have ever spent time with was not a provider but in it for her own enjoyment.  I have know four providers who were excellent close seconds, but no one touched her (and a number of her friends who were invited to amuse themselves with me from time to time.) No safe word allowed and there was no question whom we were there to please.    
It was a very exciting time, but I would not be ready to do that again now.

And wh might that be. There was  the Domina Nia but hardly any review in any board.

I have very few limits & I love to serve forbidden fruit.  Not many Doms will provide scat play & I love too!  I am a very open-minded, educated, and experienced woman.

But you are on the other coast

What is extreme to one may be par the course for another.