Lisandro does not know that this is an adventuring type event. As far as he can tell, the stunt on the floor made an impression and now he's been invited to dinner party with the nobles, to see how he does in their little signalling games. It's an important part of politics, but also he secretly likes it much more than a wizard should. 

He arrives in a carriage instead of just flying in. He's dressed in a proper evening outfit instead of his regular day to day clothes. It is simultaneously expensive and within the boundaries of Westcrown sumptuary laws, subtle little ornaments that they didn't think to ban. Said laws aren't even in effect anymore, but it's about the statement: This man is no noble, feels no need to pretend otherwise, and is instead here to show just how well-off a mercantile wizard can be. He's even managed to make his hair look good, despite wearing a headband every hour of every day. Beginner adventurers risked their lives hunting the ooze creatures necessary to produce these hair salves. 

As a favor to a new contact ~ and because messing with noble parties is fun ~ he has also brought a date.

Yeah, she can get behind messing with noble parties being fun. She didn't have anything planned for this evening; her Plant Growths were in the morning, and maybe this way she can explain to that one noble that, actually, saying a druid doesn't understand hunger is like saying a wizard doesn't know how to read. Which means: oh, look, his date is a druid. She's worn the same practical leather armor for every day of the convention, but because she has a sense of humor and a helpful wizard who can make civilization produce goods and services at her, she's in a dress. It's vaguely floral, and matches nicely with the (poisonous) flowers in her hair.

She is looking forward to the reactions for what will no doubt otherwise be a miserable, if probably very productive, evening.

There's a single moment of surprise when they walk in and then -

"- All right, how'd we leak it?"

And most importantly does Eriape know already, because if she does it's a very different situation now on their hands. 

"Lisandro," she says. "Delegate Voshrelka. I am impressed either by Fortune's hand in this or by your information-gathering."

?????? the fuck?

Voshrelka is not the worst liar in the world, though, and has any practice at espionage, so she will instead blink innocently and raise her eyebrows.

"Are we not here for a perfectly innocent dinner party? Goodness. My delicate constitution might not be able to take it."

"Your delicate constitution will only be risked if you wish to risk it," he assures her, "but certainly we can use your help."

"I think that a great many unfortunate policies are being contemplated in the very legitimate interest in restoring peace and order to Westcrown, and it would be good if there weren't a lich in the sewers, which contributes to peoples' sense that this city is not stably and wisely governed. ...technically it turns out she's not in the sewers. She's in a field outside the city."

"A sensible opinion. Though I do hope there is also going to be dinner. Or perhaps a light appetizer before the constitution risking."

"In my experience it is a terrible mistake to assemble a great fighting force and forget to feed it." She can gesture to an unseen servant to bring the appetizers in.

Okay, wizard is now coming with a glowing recommendation, because damn that was a fast turnaround on 'lich hunting,' well done wizard. Excellent sneaky wizarding, she hopes you make archmage for your sheer competence.

Anyway yes now to tactics, this party will be much more fun than she'd thought it would be!

"Well, I've one wildshape left today, one Dispel Magic, one Barkskin, a Resist Energy, and Lesser Restoration. And some healing, but it's minor. My third circle spells were all used for Plant Growth if you're unwilling to wait until dawn." She spots the maps and beams. "Oh, you have maps, wonderful."

"I have first and second circle pearls, though I use the second circle ones for magic vestment," Feliu says.

"I don't want to wait until dawn because I think we should presume the lich capable of surveillance of the city. My hosting a dinner party isn't particularly notable; everyone being gone overnight might be. Also we are imposing on Alexaera who probably has three other liches to kill before dawn, the man's goddess overworks him."

Of the many Taldene generals who did forget to feed their great fighting forces, Lisandro considers which one to reference in his reply. No, too obvious. No, too obscure. No, that one has political implications. No, that one is controversial, by reputation he can guess the archduke Xavier would argue that was the right choice to make in those circumstances. 

Then the moment passes. Should have just picked one. 

Even worse, they're deciding to go in without giving him a morning to pick the right spells. Gah.

At least there's some maps. 

Yeah. Voshrelka isn't particularly pleased about this either; she prepares spells for the necessity of escaping nebulous enemy action, but, well. That's not quite the same thing as preparing properly, and so many of her spells went into Plant Growth, or getting to Plant Growth locations in a reasonable timeframe...

"Mm. Reasonable. And this is underground? So it would probably be best to wildshape into an earth elemental... Up to you how you use your pearls, you know the current tactical situation better than I..." Maps maps maps. Where are some good places to sneak around as an earth elemental, hm?

"My source for these maps also dug out a chamber here," he points, "just outside the forbiddance. That ought to save some digging, unless there are tactical reasons to enter by a different route."

This just keeps getting better, or at least less awful. "Lisandro, what spells do you have available?"

"I have a teleport to contribute towards getting in. Only one prepared today."

That should be the right level of annoyed-but-acceding to the decision to do this tonight with no time to prepare spells. 

It doesn't much matter that he would prefer to wait at least a day and maybe even a week, enough time to get some papers and an opera out of her, before launching the raid. Duchess Carlota is the one who brought everyone together, and to the organizer goes the leadership. Lisandro is lucky to be invited, getting a chance to take part and to take a share of the spoils. A share of the notes, too, unless the paladin destroys them. Still somewhat disappointed though. About the spells, about politics and public appearances interrupting his plan to deal with the lich, and about the fact that they probably wouldn't have invited him if this was a real dinner party. 

But he isn't going to be petty. Here's some more about prepared spells.

 "For the confrontation, my main contribution will be in dispels. I also have flight, invisibility and counter-invisibility, and a few miscellaneous dungeon spells like knock. I've also had a chance to look at one of her badger minions under arcane sight."

Notes on the auras he observed on the badger go on the table for the other wizard, who is probably good at spellwork and not faking it until making it, to take a look at.

"Fascinating. In what form? Combat-prepped?"

See. Excellent example of a wizard, right there. That'll be useful for peering at things from the floor with Detect Magic, thank you!

“This is one she sent to negotiate, disguised as a dog. On a related note, I am interested in her papers and prefer to retrieve them undamaged.”

"I don't think we're calling in the Church of Pharasma for anything, and I think that's an interest most of us share."

Wizard solidarity!

“Makes sense, looking around the room. I’m after the nonmagical works as well, though. Avistan hasn’t seen a lich pamphleteer before, it’s an unusual type.”