Co-Op by Atomsk and I: what if the Unknown merged with Ooo somehow, what if Wirt and the Beast became one?, what would happen if there were more Vampires that no one knew about?, what will happen if everyone finds out things no one thought would have thought possible?, find out more in The Unknown in Ooo. contains Finn x harem, Beast Wirt X Harem, and OC X Harem's

Wirt has been in The Unknown for a long time, doing what he needed to survive and carrying a burnt-out lantern at his side. There's also a kid wandering around – a kid that can hop in and out of The Unknown at will. This kid's caught Wirt's attention, and this kid already has a deal in mind. • Beast!Wirt, Bipper • Post-The Unknown, Post-Gravity Falls