A Deal With the Devil

"You seriously summoned a devil?" Moss asked, their eyebrows shooting up in surprise. This startup idea was getting worse and worse by the day. Who in their right mind thought mass-manufacturing letter stickers was a halfway- decent startup idea? Charlotte, that's who. And now they were stuck with her, along for this stupid ride straight to a Greensoul poorhouse. They could barely afford the almost-empty office they were talking in.
"Yep. You know S'ss'k'nach, the great horned serpent of fire and blood? He was actually way more chill than I thought. Apparently, all you need to do is get your hands on a copy of his business card and bury it with a little bit of snakeskin and blood under the light of a full moon, and then, bam, you've got an almost-all-powerful buddy on your calendar for the next day. We met for tea at that old granny bakery on 14th. No big deal."
"By Z'hrat, you're an idiot."
"No, it's fine, really. Super cool. He was all like, I can't believe I put on a tie for this meeting. Do you know how hard it is to put on a tie without handssss? Which is such a mood."
They scrubbed their hands over their face. Yep, ties were a pain in the a-s, all right. In fact, Moss was wearing one as the result of another one of Charlotte's brilliant ideas. If they wanted Letterz n' Thingz, LLC to be taken seriously, they had to dress the part! As if they had shareholders to impress. "But what was his deal?"
"With the tie? No idea. I mean, I figured he'd have demonic servants to-"
"No, the deal. That you made." That presumably involved them somehow. "What was it, like, your soul to be thrown upon his eternal pyre when you die? Your first born child?"
"Oh, yeah. About that..."
By the gods, Charlotte didn't have a scrap of survival instinct, did she?

"It was such a great deal! He offered to fund us, entirely! The interest rate on the loan's only twenty percent. The only thing is that we can't clear it by declaring bankruptcy like a normal loan, but that's whatever, because Letterz n' Thingz is going places. I had to put your name down as a co-something-or-other."
"And what happens if we have to default?"

"No idea! I didn't ask, but like I said, we've got this in the bag. It'll be great!"
Moss could only groan.