[RPG] contact a specific devil

dnd-5elore

I am playing a wizard who died and then made a deal with a devil to come back to life. The terms of the contract were that he brings me back, and in exchange, I give him my first born and the soul of my friend within 30 years. If I don't hold up my end, then I go back to being dead.
The devil that holds my contract happens to be Mephistopheles, and I would like to be able to contact him to renegotiate terms.

Are there any specific spells/abilities that would allow me to contact said devil to attempt to renegotiate terms?

Best Answer

Your DM may let you use Sending

Sending is a 3rd level spell that lets you send a message to "a creature with which you are familiar". You probably met Mephistopheles in order to make the deal with him in the first place, which would mean you are familiar with him. And:

You can send the message across any distance and even to other planes of existence, but if the target is on a different plane than you, there is a 5 percent chance that the message doesn’t arrive.

Emphasis mine. There's a 5 percent chance of failure when targeting a creature on another plane (Mephistopheles is most likely in Hell at any given time, I'd assume), but if you save a spell slot every day to cast Sending, you'll probably succeed after a day or two. Negotiations may require multiple castings since each one only gives 25 words to each party.

But keep in mind that your DM could easily rule that this is not a viable method for contacting an Archdevil. The DM could decide that you aren't familiar with Mephistopheles because he negotiated the contract with you via a proxy. Or that petty mortal Sendings are beneath Mephistopheles' notice, and he either does not respond to them or has some magic or ability that prevents them from reaching him in the first place. You will need to discuss with your DM whether or not this method will work.