Choose one:
Cross x Your OC
Cross x My OC
Cross x Nightmare
Cross x Killer
Cross x Ink
Cross x Horror
Cross x Dust
Cross x Error
Cross x Swap
Cross x Color
Cross x Lust
Choose a Verse:
MinusculeTale
Lustverse
Underverse
Lamiaverse
Wolfverse
Nekoverse
Vampireverse
Empireverse
Genderverse (Genders are swapped)
LeviathanTale
Mythicverse (I made this one. It's where all the Sans AUs are some sort of mythical creature such as mermaids, sirens, vampires, werewolves, Phoenix, hippogriffs, griffins, ect.)
Make up a scenario! You don't really have to choose a verse, you can add whatever you want to any of the ships.