Hyena had it a little harder, after Monk gave him the soul-eating disease.
Dear Hyena, please roll+cool. On a miss, take 1 harm (ap, special), and choose one. On a 7-9, just choose one. Here's the list, have fun:
* The emptiness expands, and you lose the capacity to feel one distinct emotion of your choice.
* Take 1 harm (ap, special) as the emptiness ravages the rest of your soul like some burning darkness.
* You haven't been watching your kids closely, and enough of them have infected wounds that their gang size is reduced until you get medical attention for them.
On a 10+, you still feel an emptiness inside, but nothing gets worse in your life. Yet.
Love and kisses, your MC.
And a session later, I think:
Dear Hyena, roll+sharp.
On a 6 or less, pick two of these to come true. On a 7-9, pick one.
* You take 1 harm (ap, special).
* You lose one distinct emotion of your choice.
* You can sense a soul being eaten in the distance, by the tremors of fear that ripple through the psychic maelstrom. This has nothing to do with your normal view of the psychic maelstrom.
On a hit, 7+, I'll tell you how you can heal that special harm, scouts' honour.
Love and kisses, your MC.
For context: The special harm doesn't heal unless he eats somebody's soul. He didn't know that for sure (though he suspected) until he rolled a hit on that second one. Then I let him take this custom move for an advance:
When you reach into somebody's soul to silence them, roll+weird. On a 7-9, they can flee or take 2 harm (ap). On a 10+, they take the harm, and must obey a simple one-word command as their next action. If you have time with someone, and they can't do anything about it, a hit (7+) will kill them.
In order to silence a person, you must be nearby, in their presence, but you do not need to touch them. If you were hidden, you don't stay hidden when you try to silence them. They fucking know where you are and what kind of heinous shit you just pulled on them.
If they were healthy and strong, you heal all your special harm when they die, plus one harm from any other source. If they were weak, inconsequential, or already at death's door, you only heal half your special harm when they die (but you can round fractions up, if you like), and you can only heal one normal harm if you rolled a 10+.
When you silence a person's soul, it does not go on to the psychic maelstrom, nor does it go to the dead world beyond it. It is simply gone.