Umbra's Shrinking Powers Bonus Comic
There's so many places Umbra from The Costume Shop can put a shrunken Finn or Osiris. In his mouth, on his abs, down his- you get the idea. Top tier Patreon Supporters voted on the characters and themes.
This 1 page digital JPEG Bonus Comic is 18+ NSFW, discretion advised, and will be delivered digitally automatically after checkout.