巴斯双手接过其中一个“世界上最厉害的武器”，仔细地观察武器的样子，鲜艳的颜色，海星的外形，每个尖角处都有一个金色的小球。他小心翼翼地看了好一会儿，也没明白到底这个东西厉害在哪里？于是忍不住问道，
“这个东西怎么用？”
“这个东西实在太好用了，但是威力极大！”悠悠笑着说道，“先让你海里的守卫离开一下，我怕伤着他们。我给你演示一下，你可要准备好了。”
巴斯点了点头，撤下了那片海域的守卫。
悠悠看到海里的守卫都撤掉了，摇了一下手里的玩具铃铛，就听到“叮铃铃”的声音响了起来。悠悠飘到海水前，把玩具使劲儿一抛，看到玩具掉到了海水里以后，飞快地飘了回来，很紧张地躲到了仁的壳后面。
巴斯本来打醒了十二分的精神严阵以待，没想到除了铃声什么都没有？！
他刚要说话，突然，“轰~隆~”一声巨响，震得水晶宫的地面都在摇晃，伴随着海风，海面上巨浪滔天！每个人都被海水淋得一身湿！
原来悠悠跟人鱼们一早就计划好了，他会用婴儿玩具充当“最先进的武器”，到水晶宫跟巴斯见面。一旦到了水晶宫，他首先会先让巴斯把海里的守卫撤走，然后在那片海域扔下一个带铃铛的玩具。因为守卫已经撤走了，所以人鱼们可以悄悄带着鱼雷到铃铛响的附近引爆，这样的话，巴斯就会以为真的是“最先进的武器”在爆炸，从而相信悠悠和小灵妖们。
巴斯瞪大了双眼，他从来都没有见过这么厉害的武器！只是轻轻一摇，一抛，就可以有这么巨大的威力！
“太好了！”巴斯并不介意浑身的海水，高兴地说道，“不管你们有多少这样的武器，我全要了！”
“这……”悠悠装作很不情愿地说道，“这些武器很珍贵的！”
“我可以给你们很多金子，很多宝石！”悠悠越不想卖，巴斯就越想要。
“我们不换金子，我们想换成最特别的鱼类，回去卖。”义大声说道，“我们已经给你看过我们的武器了，你有什么特别的鱼类？我们也需要先看看是不是我们想要的。”
“可以，当然可以。”巴斯站了起来，高兴地说道，“这里有些不太方便，请跟我来。”
悠悠和小灵妖们跟着巴斯往水晶宫里面走去，越走越远，穿过走廊，楼梯，进入隧道，他们越走越黑，越走越低。
勇很担心地问道，“他们不会把咱们抓住抢武器吧？”
悠悠想了一想，说道，“他可能不敢，毕竟武器在咱们手上，他又离咱们这么近，一旦爆了，他也会有危险。”
大家七拐八拐地来到一处潮湿的房间，阵阵的鱼腥味让悠悠喘不过气来。他捂着鼻子，忽然，隐隐约约地，他好像听到了哭声？！随着他们越走越近，这种婴儿的哭泣声越来越大！
很快，他们来到一扇古铜的大门前，油亮的门上，有一个很古怪的凹陷。
这时，就看到巴斯从腰间拿出了一把钥匙，形状非常特别，有点像八爪鱼，每个角都有明显的凸起。他把钥匙对准大门上的凹陷，一边使劲儿拧，一边说道，“都在里面，你们选吧。”
*****************
Buzz looked at the so called ‘Powerful weapon’. He looked at it carefully. It had all shiny colours. He even looked at the points to make sure that he didn’t miss anything. Yet he still had no clue what it was for. So he asked，“What is it used for?”
“This weapon is very dangerous. I want all of your guards out of the water to perform this task. This weapon is so deadly it was kill. Understand. Be ready.”
Buzz nodded and told all of the guards to get out of the water.
As soon as Yoyo saw that the guards were out of the water， he shook the toy and “RRRRRRRRRIIIIIIIIIIIIIIINNNNNNNNNNNNNGGGGGGGGGGGG.” As soon as Yoyo heard this， he quickly threw the toy into the water and ran towards Ren’s shell and ducked.
Buzz was at full worrisome until he figured out that apart from the ringing， there was nothing really.
Buzz was just about to say “What” until ‘CRASH’ a giant wave thundered the land and the ocean currents shook the whole crystal palace. The wave crashed down and everyone was soaking wet.
It turned out that Yoyo and the mermaids had a plan. First， Yoyo would persuade buzz that it was powerful. Next， they would go to the sea shore. Then， Buzz tells his guards to get out of the water. That way， the guards won’t be able to see the mermaids. Finally， the mermaids would shoot the water bomb and that would make Buzz fell like that it was the most advanced and powerful weapon.
Buzz was blindsided， he had never seen a weapon as strong as this， as light as this and as easy to activate as this.
“I will take it.” Buzz said in glee，“Name your price and I will pay. But I want all of the weapons.”
“This will be very expensive.” Yoyo pretended to be very hesitant.
“I can give you lots of gold， lots of mermaids.” The more Yoyo didn’t want to sell it， the more Buzz wanted it.
“We don’t want gold， we want the most rare fish species.” Yi said loudly.“We showed our advanced weapons， it will only be fair if you are going to show your fish species”
“Of course you can.” Buzz said in no fear.“Come come， I will show you them.”
Yoyo and the demons followed Buzz through the corridors. They walked more and more further， more and deeper. More and more corridors and more and more dim.
Yong was very worried so he asked，“What if they are tricking us and are going to rob us.”
Yoyo thought for a moment and said，“Buzz won’t dare. We are right next to him. Besides even if he was going to， we can just explode it.”
The group went left and right for hours until， they came into a damp room full of yucky fish odors. Yoyo couldn’t breathe. Suddenly， Yoyo heard what sounded like crying babies. They seem to be getting closer.
Soon enough， they came to a huge a titanium door that was glowing the door doesn’t have a lock but a dent.
Buzz then pulled out key kind of in the shape of the stinky fish. Each side of the key had obvious similarities. Buzz pushed the key into the dent and twisted. He said，“Take your pick.”