1. Sharingan and Rinnegan .Naruto's Sharingan was given to him by Itachi Uchiha to prevent his brother Sasuke from becoming an enemy. Naruto used it to release the Impure World Reincarnation, but the genjutsu Amaterasu has a long cooldown time. 

2. Transplanting Sharingan. After Madara Uchiha's death, his Rinnegan was taken by Naruto. Madara first transplanted it onto Nagato, who then passed it to himself.

3. Potential of Rinnegan .With both the Sharingan and Rinnegan, Naruto can use the Reanimation Jutsu without worrying about running out of chakra. This is why Naruto allows Boruto to travel freely. Naruto's possession of these ocular powers gives him immense abilities and power. He can use powerful techniques without being limited by chakra and can overcome any potential threats.