
Could your (around) City lvl OC break free from the Necro Emperor's control?
The way Karthan's control over others works is by bringing their soul back from the dead, placing it into a body, and altering the soul just enough to consider themselves his loyal ally. It switches their loyalties, but keeps the rest of them the same. Caspian for instance, was sent to battle his friends as they tried to stop Karthan, and the entire fight he played with them.
To break free from the control and return to his normal self, his son joined the fight against the Necro Emperor, and his aura took Caspian's attention for a moment, just long enough for one of his friends to place a seal around his soul that broke the connection between puppet and master.