I would like to know more.
So, background. My PC on this mission was a psyker named Sandra Candle-For-The-Empire (her family is named after the ship they used to astropath for). One of the others was Sister Francisca, a hospitaler with a terrible attitude and a painkiller dependence. A few sessions ago, the two of them bonded, became a bad influence on each other, and started a little side business. "Candles For The Emperor" utilizes Francisca's pharmaceutical specialty to produce products with a wide variety of aromatic effects.
The PC party also includes a gruff old stoner Adept, Randy Jackson, with no manners and a creepy demeanor who nonetheless aces every single charisma related check. Needless to say, he's been very active in promoting our products as well.
Anyway, this dome city had been in a seige/standoff situation between the local militia and a small band of underequipped rogue space marines for over a decade. The leaders of both factions were secretly sorcerers of Tzeench, and he was using them to prolong the stalemate indefinitely and just farm it for that neverending hope of things getting better.
Anyway, we snoop around until we learn about the real situation, and that start with a raid on the city administrator's office. Said administrator turns out to be completely possessed by a Lord of Change, and turns into a shoggoth like form to defend itself. A round or two into the combat, it mind whammies us and Randy fails his save, forcing him to regard the demon as a friend. And, not sure how else to resolve the conflict nonviolently, Randy offers the Lord of Change part of his stash. He also, as is customary, rolls really, really well on diplomacy.
The demon is amused and slightly confused by this, but keeps fighting.
On his next turn, after failing to snap out of it, he tries another tac.
RANDY: Hey, you guys like making deals, right? I got one for you.
DEMON: Speak quickly, mortal.
RANDY: You leave this planet, and I give you a whol package of free scented candles.
The demon starts to laugh again, but then I suddenly have an idea.
SANDRA: Francisca! Which scent makes you feel hopeful? We need one that induces hope!
FRANCISCA: Vanilla! Definitely the vanilla!
RANDY: You heard the ladies, fella. Vanilla. All ya gotta do is nothing, and they're yours.
Randy aces his cha check even harder than usual. And, the demon knew that the battle had already turned against it (we'd chipped away a good amount of its hp, and we'd t ken only minor injuries ourselves and had all been passing our saves besides Randy). GM reluctantly rolls a willpower check for the Lord of Change. Critfail.
GM then decides that the demon still gets to roll a Perils of the Materium check to avoid being corrupted. Fail.
It takes its candles and disappears back into the warp.
I guess we'll know if he was happy with the deal if we start getting contacted by some new clientelle. I imagine we could sell our poppy scented candles to Nurgle demons, LSD ones to Slaaneshi, some sort of inhalation berserker drug to the blood guys, etc. There could be real money in high heresy.