"Stand, Men of the West! Stand and wait! This is the hour of doom."
-- J. R. R. Tolkien
Pilar holds up the Merciful Metamagic Rod she just bought.
(Obviously Pilar just did it that way to avoid entanglement with local law enforcement, and not because Carissa Sevar would've cried pathetic tears about it. Pilar is not Sevar's student anymore.)
They head on into an incredibly fancy-looking restaurant which only serves one patron at a time, accepts payment in magic items only, and also, apparently, grants up to 5 Wishes in sequence if you've got the diamonds.
Why? Who knows.
Sure, Ione will pay a fee of 2000gp to cover the case where they can't come to an agreement about the mysterious deal to be further-negotiated.
She'll then vanish from Pilar's sight, and come back six minutes later looking noticeably more cheerful, and head out of the restaurant with a spring in her step.
"One down, eleven to go!" she says, her voice sounding more vibrant and forceful than before.
"Fine, I'm fucking asking. Please tell me what the fuck we're doing, and I will only use that information in ways that benefit Cayden Cailean and Asmodeus."
"And that don't harm Keltham, who brought us along on this trip, and gave over some of Doomlord's hoard to spend, on the basis of expecting that it would not be used to harm his interests and would benefit them at least slightly."
"You will accept the words of myself or Snack Service when it comes to which ways of using that information will harm Keltham, Cayden Cailean, or Asmodeus."
"Hold on, this takes more concentration if I'm outside a library..."
The sounds around them hush.
"So, first, what do you think is going on?"
"Doomlord had enough Wish diamonds that I can get a +5 bonus to my primary casting stat, which I guess is Splendour these days, which is the treatment that Doomlord planned for himself and I'm supposed to get. Tropes suggest that Doomlord actually had 20 Wish diamonds, and Keltham, Carissa, and you, are all getting boosted the same way. For some reason it's important that nobody knows exactly which Efreet performed the service for us."
"What follows is true, but not the whole story: Mister Doomlord is from a planet not in this plane that didn't have access to ninth-level wizards or the City of Brass to convert Wish diamonds into Wishes. Wish-sized diamonds are a lot cheaper there."
"The plan is for us to get all of our abilitystats wished up."
"Ione, it's not that I lack all sense of eagerness here, but this sounds increasingly like a really large fucking issue. Not like telling Cheliax, like telling the Worldwound alliance sort of issue."
"It is contrary to the nature of my library powers that they be used for horrified screaming rather than privacy and solitude."
"Disappointing. Let me know if you spot a scroll of Silence for sale so I can get my screaming done at some point."
"Did Keltham get all of Doomlord's diamonds?"
"Technically, I'm the only girl he's still dating."
"And Keltham already donated the vast majority of Doomlord's remaining diamonds, minus this expedition, to the Church of Iomedae. Which you're not allowed to warn Cheliax about because that hinders the interests of Cayden Cailean and Keltham."
"Okay... that's very bad, incredibly bad, extremely bad, and yet I'm still feeling relieved."
"- is the Church of Iomedae by any chance under a constraint not to do things with the diamonds that harm Asmodeus's interests?"
"I won't say that I don't know, because I do. But I will say that it depends on people's choices, including yours."