At first, the whole situation was innocent enough. It gave you things, made you feel good about yourself. You came to it when you had problems, and it helped you solve them. And when you asked how you could repay it, it told you to be patient. That all debts would be settled in due time.
It hadn't mentioned debts before that.
You've got satan as your cornerman, or a demon in your brain. Or you're the right-hand man of something otherworldly. Maybe the stars glow for you, and you alone. Regardless, you owe a debt to something much bigger and more terrible than you will ever be.
Distant, Quiet, Anxious, Tense, Frantic, Vicious
Empty Eyes, Calculating Eyes, Burning Eyes, Flickering Eyes, Piercing Eyes
Bartered Soul, Last Chancer, Returned, Emissary, Legion, Lackey, Chosen
You get all the basic moves.
You automatically get:
Name the power that you owe a debt to. It can hold Strings against you. You can choose to carry +2forward on any roll, in exchange for giving that power a String against you. When the power holds 5 Strings against you, your Darkest Self is triggered (it can also be triggered in other ways, like normal).
Also, choose two:
Give the power one String to use a move you don't have, just this once.
'Need' Is My Favourite Word
When you, like, really, really want something, give your power strings. Roll +strings given. On a 10+, choose 2. On a 7-9, choose one: You get exactly the thing you wanted; It doesn't come at a cost to anybody else; It costs you one less String.
When you bring an innocent soul to the power, mark experience.
Fury Beyond All Earthly Fury
When you lash out at someone, you may suffer 1 harm to deal +1harm, regardless of whether you succeed.
When you lash out at someone, on a 10+, they lose 1 String on you. On a 7-9, add "they lose 1 String on you" to the list of options.
When someone sleeps with you, you may give them any number of Strings held against you by your power. If you do, it counts as them gazing into the abyss.
The power takes over your body, and carries out its own agendas. The MC controls your character's actions and speech, for the time being. Every time the power makes you do something you don't want to do, it spends one of the Strings it has on you. You can Act Under Fire to convince it that "no, not that. Anything but that." But it keeps the String, in that case. You escape your Darkest Self when the power has no more Strings.