If you could make anything into secret seed, no matter how complex, what would it look like?

[Asternove]

Adds Flowey to the game. He has control of your save file btw.

 

[Salty_]

"world^3" (Cubed)

The world generates a map 1/3rd of the size as the selected size, then makes every block 3x3 instead of 1x1, tripling the size back up, resulting in an incredibly blocky world.