Artificial Heart: The muse no longer feels emotions- no pain, no anger, no rage. They simply become an apathetic shell. Can be broken early if something strong enough manages to break their "emotional inhibitor."
Nobody Loves You Like Me: The muse is going to die soon (when the M!A is up) but first, they've decided to show anyone who may have hurt them in the past just what sort of pain they were put through.
Want You Gone: The muse has given up on fighting, and now they just want to be left alone. However, it seems that as soon as they want solitude, everyone wants to be around them!
First of May: Your muse is ridiculously horny and will attempt to seduce anyone who comes along (anon decides whether regardless of sexual orientation or not.) However, there's a catch: Your muse won't be fully satisfied unless the deed is done outside. In broad daylight. Probably where there's a high chance of them being spotted.
Re: Your Brains: Your muse is now a zombie and really just wants to eat people's brains. Fortunately for the muse, they have a bit higher IQ than your average zombie, so they've realized that going around and yelling "BRAINS" isn't going to do much. Rather, they'll go door-to-door, asking people for their brains. Much more civilized.
Creepy Doll: The muse is starting to freak out, because wherever they go, whatever they do... there's always a creepy old doll following them. And whether it's a hallucination or not, they're starting to think that the doll might even be talking...
You Ruined Everything: Congratulations! Your muse is now a parent! (Anon decides the other parent, if any.) However, they aren't quite sure how to cope with this new-found parenthood.
I Feel Fantastic: Nothing can make your muse feel bad anymore, just as long as they keep taking their "medicine." However, it seems to come with a few side-effects that make your muse seem just a bit off...
Skullcrusher Mountain: Your muse is now an evil madman/madwoman... who just so happens to be obsessed with getting their significant other to love them.
Blue Sunny Day: Your muse is now a vampire.