Tsukuyomi is the ability to control the virtual world and inflick pain to their opponent. This is a special doujutsu which uses the Mangekyou Sharingan. Whoever look into the user's eyes will be under their control and see an illusion. The user is able to control time and space as they please. 1 day in the virtual world is equivalent to a couple minutes in the real world. Only a Sharingan user is able to fight the ilusion. A non Sharingan user will die instantly.