Mirage Arcane

You make terrain in an area up to 1 mile square look, sound, smell, and even feel like some other sort of terrain for 10 days.
Similarly, you can alter the appearance of structures, or add them where none are present. The spell doesn't disguise, conceal, or add creatures.

Creatures with Truesight can see through the illusion to the terrain's true form but are still affected by it.

“I twist the fabric of this world, reshaping it in my image—their minds will break as they live within the fals