are illusions against the laws of magic? veils that make people or things invisible seem to be allowed, but what about showing things as something else?
for example, some sort of magical disguise? disguising a building or something as a vacant lot or another building... a lot of people are seeing the illusion - does that count as going into their minds?
or distracting guards with an illusionary animal?
(does not happen often in the books, but could be possible.)