this was a request from
to put Marceline and Oswald together.
I'm the person who can make any idea explode.
So I put the two fighting against some mysterious villains called the Half-Hearts, shadow demons who only possess a half of a heart.
In order to fulfill their hearts into one, they need to possess a body with a full heart.
I really hope you like this
EDIT: Everybody's been commenting on who's Oswald, so I give you a [link]
this should be an idea for Ozzy's Adventure Time Z episode.