Invincibility Starts with Skill Upgrades

"Do you want to lose 100 energy points and improve the five tigers' door-breaking sword skills?" "Yes." "Do you want to spend 500 energy points to improve the Evil Tiger's Evil Sword Technique?" "Yes." "Whether it is consumed..." "Yes." "Yes." "Yes." Li Wu waved his hand with great courage. The energy value is enough. Under the golden finger, the little knife skills are upgraded like a rocket. From the ordinary Five Tiger Door-Breaking Knife, it was upgraded to a supreme magical skill in one fell swoop! Newbies, new books, newbies, please give me some recommendations and favorites.