People who brush the library report it every day. Boss on the second floor, if the output is enough, three will enchant. You don't have to drive all the time. Of course, if there are five of you, it's not impossible to keep driving. But the best thing is: you need a chain. I can't remember which gift it is. The fight seems to be, two chains. When the war starts, the first one pulls the boss before, and the second one pulls the boss after. Pull it to the door. Just knock on the door. There are two places that need to be enchanted First, after the boss flies, he will put up high injury skills. The second is that lightning with horizontal stripes will be brushed randomly. If lightning comes from the opposite side, you need an enchantment. If you come in through the door, it's unnecessary. Try once and you'll know what I'm talking about. If you still don't know, you can say YY Well, above