You create a large illusion that causes the affected area to show false details. The exact details are up to you, but you may change any square within the affected area to change its appearance. The target must make a Foresight saving throw vs. your Spellcasting skill TN.

• Success: Though the creature still sees the illusion, they know that it is an illusion. But being unable to see the underlying terrain, they treat the targeted squares as difficult terrain.
• Failure: The creature perceives the squares as being whatever sort of terrain you chose to disguise them as. If the creature enters a square that contains a hazard, they will take 1d10 Non-Lethal Mental damage. If they enter a square that actually contains a hazard, but has been disguised as safe, they suffer slight on saving throws against that hazard.