It Wasn't Supposed To Be Fair
It regards you from behind the free-standing mirror, its long-beaked skull quizzically tilted; you weren't supposed to summon it again before your half of the deal came due. But—
You're careful not to stutter as you speak, as hard as that is.
“You tricked me, and I want out.”
Its shoulders shake, and it takes you a few moments to realize that It is silently laughing at you.
“It's not funny!” you sputter. “The power and wealth you gave me wasn't what I thought it would be—you wrote the contract to be unclear, and took advantage of me!”
It finally composes itself, and wags an iridescent finger at you. “You signed it in your own blood. You agreed. It's no concern of mine if you didn't make sure that what you would get was what you wanted.”
“That's not fair.”
“Did you think it was supposed to be?”
You sigh, and carefully kneel to etch a few final lines into the floor. Inside the mirror It cranes its head, stepping closer to the surface to get a better view. Its expression doesn't change as It sees the binding circle that wraps around the mirror; Its mask can't change.
Its voice carries more emotion than you have ever heard from It before, far more even than the avarice with which It told you what It could offer you and what you would give It in return. It almost sounds afraid.
“Wait, what are you doing? That's—”
You ignore Its sputtering as you light the final candles and carefully break a vial of phoenix-blood into the chalice which will fuel the binding for as long as you might live and millennia beyond. You ignore Its pleas and curses as you speak the final words of the binding—
And then the basement is finally, mercifully, quiet. It beats desperately against the inside of the mirror, cracks disappearing as soon as they form; It screams in despair and you hear nothing but your own satisfaction at a job well done.
Sealing up the basement in layers of concrete and steel and magic is easy enough; you make sure that nothing natural nor unnatural can disturb Its prison, not without you being well aware long before the last wall falls.
It's … easy. Everything is so easy for you now.
Sure, what It gave you wasn't what you thought you wanted, that part wasn't a lie. But it's still useful, and you had little trouble parlaying it into something more useful to you. The world's your oyster, and you have the perfect knife to shuck it.
It's almost boring.
Decades later, when the day your deal would have come due pops up in your calendar, it's almost a surprise. You'd half-forgotten about the deal, stopped counting the years as soon as you imprisoned It, so …
Why not visit It?
Its prison is still safely buried; there's a park on top of it now.
There's even a little path, and a bench beneath a tree, and an artificial waterfall sparkling in the sunlight.
It's a nice place to sit and contemplate the horror buried a few dozen feet down.
The assistant you tasked with making sure that It would never be found has done good work, clearly, even if it's a bit self-indulgent. Even if it feels like she expected you to come here at some point; you make a mental note to give her a raise. Or release her family? Whichever.
The bench really does have such a good view. Sitting in it, staring out across the shining city, you can almost see the entire pathway of your life unspooling before you. There's that vast mirror in the distance, looming over everything, and the stormy hands reaching out—
Wait.
The thread of your life arcs across the city, rich and shining, entangled with so many others that you've touched—all those you've hurt and helped and shunted into new orbits, all the ones you've hardly noticed; and those stormy hands are reaching for it like scissors—
You muster your defenses, hurling your own storm of angry magic out into the world to meet this strange attack, summoning up hunter-killer dolls from their carefully ventilated coffins and whispering new orders through the etched halos of feral angels.
You fill the sky with your wrath,
and it does nothing.
Your minions buzz about like panic-stricken flies, unable to see what you can see so clearly; their wild attacks meet nothing but empty air.
And then they begin to fall as those vast hands peel them away from your life.
It starts with the loosest threads, the lives you've hardly touched and the minions you've hardly used; each one comes away with a gentle snap of static electricity, and each thread fades as the hands cast them away. You remember that they were there, but nothing more—
Slowly your life grows less vibrant; slowly the hands take away everything that you had, everything that you were, except the mindless pursuit of power. Your memories of wild parties and vast emotions fade into barren nights spent staring at stock tickers and lonely dinners—
And as you slump back onto a bench that's not even there any more, as the park fades from around you into first a concrete bunker and then the half-ruined building where you had imprisoned It, there's nothing you can do to claw back your past.
Finally there's just the staircase down to the basement and those vast stormy hands waiting on either side, gesturing you to go down, to descend to the place you imprisoned the thing you'd long ago made a bargain with,
And you don't have any choice but to slowly obey.
In the basement, behind the mirror, It is sprawled out on the floor, tossing a wadded up piece of paper up and down; It sits up when It hears you coming and carefully smooths the creases out of the contract.
Your bloody signature still shimmers at the bottom.
“Finally back, huh,” It says, Its voice clear even through the binding spells. “Did you enjoy learning what happens when you try to break a deal?”
You glance back, up the stairs; there's nothing there.
“… no. No I did not. What the fuck was that? What did you do?”
It laughs. “It's what you did! The Arbitrators really don't take kindly to people trying to welch on their end of a bargain. You should have just enjoyed what you had.”
“… fuck you. I'll find a way to undo this, to put everything back as it was. Better than it was.”
It stands up and regards the contract, then looks at you with empty eyes that seem far too large. “No. It's time for you to fulfill your half.”
You scream curses at It as It steps through the mirror, passing across the concentric layers of the binding circle like it was no more than empty air, like it wasn't even there—and then your mouth snaps shut as It idly gestures at you.
“There, that's better. You've always been too noisy.” It glances down at the ward for a moment as you back away from It. “Really not bad work; you just didn't know the fate you were inviting in. You should have read the contract better~”
Your back is flat against a wall where the staircase should have been, trying to press yourself through it as It approaches you, your final desperate attempt to fight It failing utterly as Its hand slips into your chest and plucks you out of it; your body slumps down to the ground, mindless and still breathing, as It raises the glittering flame that's all you've ever been to Its lips and slurps you down—
And then there's nothing but endless cold leeching away at your soul's dying heat, a slow digestion that is so much worse than the hell you once thought you were consigning yourself to; and as your spark finally sputters and goes out you do not even have the happy memories of a life well lived to soothe this one last torment.