Ninjutsu Era: Use Multiple Clones at the Beginning to Shock the World!

When I woke up, I was transported to a world where chakra was revived and everyone practiced ninjutsu! People in this world don't know about the Sharingan and how to destroy the fire? The highest level of ninjutsu has only been developed to level A? Zhao Han came through time travel, formed seals at the beginning and displayed multiple shadow clones, shocking the whole world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.