There were no GMPCs doing shifts to my knowledge but there were Empaths able to do it when the system came out.

Edenlaen was shiting people back to normal although it was not something she did as a public thing.



"So like I said, don't take it personally. All cultures have their share of fools. It's just that we always felt yours had a lot more than ours."
~~Warrior Mage Guild Leader Senfrislor, The Prydaen in Their Own Words~~