User blog comment:Iron.Shadow.Dragon/Take Over: Satan Soul origins?/@comment-2186265-20131021090715/@comment-7418318-20131021095033

Nice theories, but unfortunately without any proof.

We only know that "the beast" overwhelmed Elfman. It was never stated whether he had fully taken over any other, lesser beasts before that (though it would make sense if he did. How could he even think about going on an S-class mission without a take-over).

And just because take-over: beast soul works that way does not mean that take-over: satan soul has to be the same. If they were the same magic, there wouldn't be any need to give them seperate names.