First of all, after the third chapter of the Cross Hunter mission is completed, I will send a skill book that I will definitely open. Then there is the Lion King City, the adventure of the key maker, so that when you fight the Lion King in the future, you can also get your own mysterious manual. Then the time traveler mission, Shenmu's There is also the golden palace task, which can obtain a mystery. Finally, the new dimensional library. After three chapters, you can get 20% free choice manual, which can increase your skills for any four rounds 100% to 20%. General mysterious battles, such as Aka, Old Merutabis and other boss, can explode. I hope it helps you.