Fantasy World Character Playing System

This is a big fantasy world, where thousands of races stand in harmony and heroes compete for hegemony. Yi Yun obtained the transformation system of characters from all realms, Uchiha Itachi, Whitebeard, Tathagata Buddha, Warring States Marshal, Kaido... When the missions of transformation were revealed one after another, the big guys in this world suddenly discovered that they really understood the world? What are the Five Shadow Villages? What is the Akatsuki Organization? What is Jinglingting? Where is Malinfando? What is dragon-slaying magic? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.