For example RJ said once: "The gholam - singular and plural are the same -were created, not bred. Supposedly their creation involved making them so that they would be obedient to the Chosen, whoever they might be at any given time. This was an attempt at copying something that had turned up in Myrddraal, which seem incapable of disobeying one of the Chosen, possibly because of the use of the True Power in creation of the Trollocs , the parent stock of the Myrddraal. Even Aginor, who created the Trollocs, and thus indirectly the Myrddraal, was uncertain about the actual cause."

That fits with Alviarin's TP mark from SH.

And it only makes sense that at least some of the special Shadowspawn abilities also stem from the TP, like obviously Grey Men, Fain and Slayer were changed by the TP, not the OP.