My party recently:
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Got to level 18
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obtained the swords of kas
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I have 17 levels in Bard and one in druid currently, because of that I can cast wish with the right feats, which I have currently.
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my character recently reunited with her last living family member, her sister, who is now a warlock.
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I want to nullify the deal, since the magic can’t be taken away and having your soul gone sucks, but none of us know who the patron is.
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Could we learn who through divination spells? And if so:
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could a wish spell nullify the pact and un sell her soul? I would assume yes since the reality bending part is so ambiguous and encompassing
So in terms of calling on wizards or diviners I’m on good terms with, there were plenty of them, but all of them (along with most of faerûn) died in a catastrophe caused by a former friend of the party. There is a library with important resources on magical threats and general magic though, which may still be standing among the ruins
While this catastrophe started and progressed, the party timeskipped 100 years or so. The warlock was out of the timeskip (or so we think), and is unlikely to have kept any copy of the pact over the years
A wish is probably the best way to go about it, but the pact may have included some sort of clause about de-aging, considering the warlock is human and should not have lived 100 more years and hardly age at all.
I’ll discuss the plans with the DM and see where that gets us, hopefully there are no unforeseen consequences to the characters!