weakest snake to strongest dragon with cheat cultivation system

I used to be a human, but now I'm a normal snake in a cultivation world. god said "it is dangerous to have memories of the modern world in this ancient time so I erased his memories." Satan said "HAHA! he won't be able to cause disaster in that puny body! I will just give him this cursed book even I dare to open!" god: "..."(°-°) me:"!"\(°^°)~[]