[quote=EldritchOne]
Well he can't turn you into stone, but I guess I might be able to work with the idea that it takes a few seconds to kick in, in which case the opponent has a chance to move a bit before going completely rigid. Once again that'll need to be enforced however, as it runs into the same problems as the willpower principle.
[/quote]

Yep, I'd almost suggest a dice roll, but I generally abhor such things.
And sorry, I saw "Gorgon" and my first thought was- He turns people to stone!