My gave a subtle influence on a victim's psyche, increasing their loyalty to this young lord. I had no fear after informing him of the effect that he would rat me out to his old one. It was a wonderful ability, more useful than a Slave Contract because I could forcefully use them to subdue creatures.
The only caveat was that I could plant very few . The victims also had to be weaker than me. With Slave Contracts as long as they were willing anyone could sign their life and nine generations away to me. I figured with my current mastery of Soul Dao I could at most plant three .