Reverse the Curse
A teenager whose only living relative has recently developed Alzheimer's. The deal is to cure the disease. Behold, opportunity for Exact Words to come into play.
A True Lady's Quest - A Jojo is You!
How are normal people informed that they can make such a deal? Does Satan just appear to those that seem easy prey? Or is it something more complicated?
It'll vary. Speak of the Devil is in application, so you could call him deliberately (or one of his minions). He also has his own plans, and if granting a wish of yours would further them, he'll just show up.
If I'm asking for advice on a story idea, don't tell me it can't be done.
An elderly lady who has lost her husband before he was saved. The devil shows up to offer to bring him back—her soul in exchange for the chance to save his.
Amateur cook Professional procrastinator
(Assuming that traditional rules apply and Satan can grant everything.)
A military general who is obsessed with advancing his career, and lives in a country currently on war. (Is the setting the real world?)
A scientist wants to sell his soul in exchange for a way to create clean, cheap, and easy to produce energy.
A priest plans to trick Satan by pretending that he wants a contract, learn as much as he can about how Satan works and then back off without signing the contract at the last minute.
A mass murderer or something similar believes that his soul is already beyond saving, so he might as well make some profit by selling it.
Bird mom
You might want to consider the angle that in Jewish tradition Satan is a prosecutor. As for the clients make sure that most of them have very sympathetic reasons for the Deal with the Devil. Otherwise the lawyer loses sympathy. Maybe clients who made deals to save the lives of others, or bring about great social change. That would also give the protaginists' article basis, as the deal was selfless in a sense.
The Crystal Caverns A bird's gotta sing.
"As for the clients make sure that most of them have very sympathetic reasons for the Deal With The Devil. Otherwise the lawyer loses sympathy."
He's intended to be morally neutral, so I'll have a mix of sympathetic and unsympathetic clients, and he won't care which is which.
If I'm asking for advice on a story idea, don't tell me it can't be done.
Trickster God
International Law requires that any story involving selling one's soul to the devil must have a thinly veiled Robert Johnson / Tommy Johnson pastiche.
One of my stories, the protagonist is a supernatural lawyer who helps people get out of Deals With The Devil. I'm thinking of having him be one of the guys who backed Satan when he rebelled against God, and then the protagonist decided that Satan was even worse. God and Satan both need humans to power them, and they realized that a full out clash between the two of them would destroy all creation, so they set up a system of rules that anyone with any power whatsoever has to follow. Hence why Satan has to follow his deals, even if they don't work out well for him.
Anyway, I need some clients for this guy. He'd deal with two categories - people who have already made a deal and don't like how it turned out, and people who are planning to make a deal and want help tying up loopholes. Can you guys think up some characters?
If I'm asking for advice on a story idea, don't tell me it can't be done.