Okay another one in the Magic Realm but there is just infinite things that could happen and stuff.
You can't stop me anyway :D

Lets start!

Marco, Star, Jackie, Tom and I think Oscar as well are throwing garbage down the waterfall because portals doesn't work. The Waterfall, which they fall down into the magic realm in the serie, is actually a elevator. So the way down isn't as easy as in the serie.

By activating the elevator (The unicorn did it) there are also "monster" appearing Insider the floor on the elevator. (The elevator is just a circle on the floor with a slowly closing circle roof. When the roof closes completely the elevator goes down) The monster are being influenced by the dark magic and attack Star and the others. To fight them properly they going into the circle and are planing to stepping out before the roof is closed. It is too dangerous. A quator of the roof was still not closed and Star anounced the others to go out.

What a surprise , Marco and Tom though are too busy with the monsters, that they can't get out in time.

The moment the elevator starts moving, the monster dissapear. 
Tom and Marco are in some way fainting, and when they wake up again, their suroundings are different.
The shape of half od a circle is still there, but way bigger then the elevator before. (They are still in the elevator but their minds think different)

While Tom is waking up on safe ground with nothing besides a few bushes and stones, Marco wakes up neraly on a cliff, also with many stones and dried plants. The area looks like a desert.

Marco is walking around the area until he sees a  goat like monster. It has horns, big eyes, it's very hairy and the double of Marcos hight. Don't forget the sharp teeth as well.
The Monster is running towards Marco, who is preparing himself to fight (or run away)

Back to Tom, who decides to explore the area too, he also meets one of the monsters. It's a different one Marco is fighting though.
It has smaller eye but a grumpy expression, besides the lion body. It is bigger then a normal lion and it's face is layed with many skin. (Gross)

Both if them are fighting the monsters as best as they can, until one of them gets punched pretty hard. When he looks at the Monster again, he realizes that the monster is the other one (doesn't matter who of them gets hit. Maybe even both )

The one tries to gets the attention of the other and they are seeing each other clear again. Tom is explaning their situation after.

The elevator has six floors, they are now on the first one. The nearer they get to the last floor, the magic Realm, their memories will fade more.

(What exactly is happening on the different floors is all up to you right know. I didn't think of something for each floor. They get tricked by many similar scenarios and fight each other more I guess.)

When they reach the Realm of magic, thry part ways, because they are mad at each other. (Because one was always trying to kill the other )

Tom is shortly after influenced by the magic and loses his memory. He meets some little unicorns and think they are cute. He also points out that they have horns, and find out that he himself has horns too. So he thinks he is an unicorn. (Picture! It is way more funnier with a dialogue :/)

After a short period of time a darf unicorn comes to Tom and the others and stabbed them. (Well the unicorns not Tom) They turned purple after that and Tom wants to be turned purple as well. The Unicorn will asked something like ,,Are you an unicorn then?"
Tom would answer something about that he is an special unicorn because he got two horns.
The little unicorns around him are stabbing him after that and he gets purple!

(Thats kinda just another possibility of how he got possessed by the magic in the series, but psssh)

Well the end can turn out differently again. I have no idea what happens to Marco but I thought he would find out about pudding and will definitely meet Tom again!

I also noticed that these "AUs" are more like ideas for One-Shots :/
Even if you can think for yourself what can happen and stuff, I don't think that these are just AUs. I think in an AU, there isn't so much set in stone by the story as at mine.

I know AUs where Marco is a girl or a demon
Or where Tom is human or Star never meets Marco, I don't know.
There is just one thing for sure.
My AUs already have a full story, it's like I got an AU and write my story with it (What I didn't!)

I will continue writing these Stories/AUs so don't worry :)
Hoped you had Fun reading

See you next time!