Any ideas for Genjutsu? I want to make my main character to be overpowered with Genjutsu just like Itachi!

Any Genjutsu is allowed!

[Any Sound Based Genjutsu Ideas]

(like using the sound produced by walking)

[Pre-set trigger Genjutsu Ideas]

(A genjutsu that only works by doing a specific condition like scratching your head or tapping your hands)

[Manipulate/Change Memories Genjutsu]

(or any Genjutsu that directly interferes through chakra through the brain without being detected)

(not too overpowered like kotoamatsukami that instantly changes a users will just make it so slightly change memories)

[Illusion Genjutsu Ideas]

[Izanagi based or any Genjutsu that can alter reality but only with something as a trigger to work]

[Other Genjutsu Categories]

And please give the name of your Genjutsu Ideas! Make it Japanese so it will be cool!