Assassin's Creed (Adventure Time Style)

1000 years have past and the land of Ooo had not looked the same. Marceline then finds some clues that will help her go back to the past and stop any certain events. However she'll meet someone that reminds her of a certain human. Will have some slight Assassin's Creed moments, some yuri moments and a harem. Early birthday present from my friend TME (Twilight Master Emerald)