Before you try to possess someone you think about what other powers you could possibly have. You try to focus on making things disappear from your room and try to create balls of fire with your hands, but nothing seems to happen.
Then all of the sudden you start to feel a little weak. You look at your hands and start to see a bit blurry. "What the Hell is happening" you think. You then start to choke on what appears to be some kind of green slime. Out of exhaustion you collapse onto the ground trying to breath. But you can't. Everything goes blank as you faint.
You wake up a little later. You try to look around you but are confused by how everything looks. You are seeing everything from a ground perspective. "What is going on" you try to say, but the only thing that happens is the sound of sobbing slime spreading through the room. You try to move yourself over to the mirror which goes surprisingly easy. You look into the mirror and see.
Nothing.
"That's weird" you think. And you move a little further away. "Holy Shit" you think as you see a green pool of slime appear in the mirror. "Is that me?".
You move left and right and see the slime in the mirror following you as you go. "I've become a slime." you think. You can't keep your dirty mind from thinking of the possibilities of your new form.
"I'm gonna have some fun with this." you say, knowing slimes can enter people's bodies and possess them just like ghosts can. You think about who to try your dirty plan on first.