Dr. Morte: be careful who you choose to be your minion. Once they sign this contract, you're stuck with them forever. Black Hat to himself: you sound like a boomer giving marriage advice but ok.
Dr. Morte: now keep in mind that this will be binding for the rest of their natural life, or longer if you prefer. It's customizable.
Black Hat: What is "longer"?
Dr. M: Might be what you're looking for if it seems you're going to be around a while. If that's the case, do come visit every few years. Everyone else only sticks around so long, and you know I'm not leaving anytime soon.
Dr. M: Good. As I was saying, if you don't transcribe this exactly right you will be sacrificing them to ancient entities beyond your comprehension. On the plus side, they may send you something in return. It'll be worth whatever they judge your offering to be worth. That sir, is on you.
BH: Ok, I will not get that wrong.
Dr. M: I'm not liable for your mistakes, whatever happens is not my responsibility.