Create Dracolich

Go through the process of creating a Dracolich and all that entails.  Unlike the normal process, however, you twist the ritual to make the Dracolich subservient to you until either it dies or you do.

Upon creation the Dracolich makes a Wisdom Saving throw to recognize that you have tampered with the spell.  If it succeeds, while it will serve you absolutely, it will plot your demise to free itself.