Board Thread:Naruto Discussions/@comment-37302121-20190324174107/@comment-4974066-20190325030037

Not all genjutsu require a medium. What you see happening isn't whats happening in the real world. Kurenai didn't actually vanish into thin air. What is shown is what the target sees. Not every genjutsu requires some special eyes or a finger point to trigger it. Much like when Kabuto used Temple of Nirvana. All that is needed is the hand signs and ordinary shinobi can choose where the genjutsu takes effect.