Y/n L/n: The Wandering Immortal

(THIS VERSION HAS BEEN DISCONTINUED GO CHECK OUT THE REWRITE AT https://www.wattpad.com/story/360223471-immortals-rekindled-male-reader-x-adventure-time)
Y/n L/n has been a figure in the Land of OOO for as long as most of it's citizens can remember. He has seen it all, or at least he thinks he has in his immortal life span. Now he has taken two people under his wing, Finn the Human and Jake The Dog. Together these three will turn OOO upside down and perhaps Y/n will rekindle his romance with a certain Bubble Gum Princess and a Vampire Queen.