Boy, what's going on with the frost and cold anger on Niuniu's body and the cold autumn water? Ao Tao said while nibbling on the fish while looking at Lin Luo.

"The cold hidden autumn water is Niuniu's own comprehension, as for the frost and cold anger, it was by chance, I got some spring water, and after the baptism of the divine spring, the water attack on Niuniu's body evolved into the frost and cold anger." Lin Luo said directly.

"It seems that you are also a person with great opportunities, and this is all for you." Ao Tao nodded and said.

"It's okay, I came here today I have something I want to ask you, didn't you tell me about the advancement of super mutant beasts before, does Niuniu need dragon crystal and dragon heart grass if she wants to advance, it just so happens that I got a dragon crystal a few days ago, but there is no use written on it, I want to ask you today, this already has a dragon crystal, how to advance Niuniu." Lin Luo directly stated his purpose.

"You mean, you've harvested a dragon crystal?" Ao Tao said with a look of surprise.

The dragon crystal is an extremely rare existence, even Ao Tao took a long time to find a dragon crystal, and now he was a little surprised to hear that Lin Luo actually had a dragon crystal in his hand.

"Well, I was lucky enough to kill the Split Sea Dragon Whale before, and that guy broke out." Lin Luo nodded and said.

"What? Is the Splitting Sea Darkdragon Whale dead? Or did you kill? Your strength should be far behind, how can you kill the Splitting Sea Xuanlong Whale, although that guy's strength is not as strong as mine, but at present, it is far from what you players can deal with. Ao Tao said with a puzzled face.

Hearing Ao Tao say this, Lin Luo had a certain understanding of Ao Tao's strength, at least it was stronger than the Split Sea Xuanlong Whale that he had killed by luck before, and the strength of the Split Sea Xuanlong Whale was among the fierce beasts at the beginning, and its strength could be regarded as a top-notch existence, not even worse than the fierce beast that went to attack the Tang Kingdom.

"Is this guy's strength so terrifying?" Lin Luo muttered secretly in his heart.

Then he also told how he was lucky enough to kill the Sea Splitting Dragon Whale. From being chased and killed, from being swallowed into the stomach, it was completely told to Ao Tao.

"You're lucky, you killed the Sea-Splitting Dragon Whale and exploded the Dragon Crystal on his body. No one is really lucky. Come with me. Ao Tao said with a chuckle.

After speaking, he also walked to the depths of purgatory with Niuniu in his arms, Ao Tao's steps were fast, and he always took a long distance from a long distance with a seemingly easy step. Lin Luo followed behind Ao Tao, almost using all his strength to barely keep up with Ao Tao's extremely fast speed.

After running fast for almost ten minutes, Lin Luo finally came to the depths of purgatory.

What catches your eye is a huge cave, and the perimeter of the cave mouth is covered with countless bones, and the white bones are scattered all over the place.

The cave in front of me is so amazing that it is hundreds of meters high, and you can't even see how deep this cave is at a glance.

"This guy's place is too big." Lin Luo said silently in his heart.

Following Ao Tao's footsteps, Lin Luo soon entered the cave.

When he came to the cave, a scene that surprised Lin Luo appeared. The inside of the cave was much wider than the outside, and it was not this huge cave that surprised Lin Luo, with a huge body like Ao Taolong, it was very reasonable to live in such a large cave.

To Lin Luo's surprise, the entire cave was full of countless jewels, full of golden light, the walls were inlaid with jewels that Lin Luo couldn't name, and there were countless gold and silver nuggets scattered on the ground, and Lin Luo even saw several diamonds and soul beads on the ground.

These five treasures, which are extremely rare outside, are just like garbage here, and they are randomly thrown on the ground.

"Damn, soul beads, diamonds, luminous beads?" Lin Luo said with a surprised expression.

No, looking at the jewels scattered on the ground, Lin Luo couldn't help but swallow his saliva. The contents of this cave are too tempting, and if you take all the contents away, Lin Luo may be able to buy a mansion in the center of Yangcheng.

However, Lin Luo's heart was moved, he didn't dare to pick up the things on the ground, God knows if there would be some prohibitions on the things here. Besides, Ao Tao is standing in front of him, and if he wants to take these jewels, he still has to weigh his strength.

Holding back the desire in his heart, Lin Luo followed Ao Tao's footsteps and came to the depths of the cave.

In the depths of the cave, a huge stone henge appeared in front of Lin Luo's eyes, the stone henge was hundreds of meters in size, and there were nine stone pillars hundreds of meters high around it, and the dragon body was carved on the body of the stone pillar, and the dragon body of the five-clawed golden dragon climbed up, and the whole dragon body was dead entwined with the stone pillar in front of him.

Above each stone pillar, there is a dragon head tens of meters in size, and each dragon head is depicted vividly, as if it is alive.

The nine dragon heads were all aimed at the stone henge in front of them.

"Give me the Dragon Crystal." Ao Tao said to Lin Luo.

"Now, here's for you." Lin Luo hurriedly took out a dragon crystal from his backpack and said.

Ao Tao took the dragon crystal that was blue like a drop of water, and took Niuniu to the top of the stone henge.

After the two of them, one big and one small, came to the top of the stone henge, Ao Tao also told Niuniu to let Niuniu stand in the center of the stone henge.

After placing Niuniu in the center of the stone henge, Ao Tao walked down the stone henge and walked to the front of the stone henge, only to see Ao Tao chanting words in his mouth, and the vague and difficult rune spell mark was finally pronounced from it.

At this time, the nine surrounding stone pillars erupted with dazzling light, and thick rays of light directly converged above Niuniu's head, forming a huge ball of light.

The appearance of the light cluster, Ao Tao did not hesitate, and directly threw the dragon crystal in his hand into the air, and the dragon crystal flying in the air seemed to be pulled by the light group, and quickly rushed towards the light group.

In the blink of an eye, it had already entered the light cluster.

After throwing the dragon crystal into the air, Ao Tao did not stop the operation in his hand, and suddenly, Ao Tao's body turned into the black dragon that Lin Luo had seen before, and the black dragon of hundreds of meters hovered in the air, if it weren't for the fact that the whole cave was too huge, Ao Tao's huge body really couldn't be used.

The black dragon transformed, and Ao Tao let out a roar violently, and the roar resounded throughout the cave.

Then I saw a blood bead the size of a football appear on Ao Tao's forehead, and scarlet blood beads emerged from Ao Tao's forehead, and immediately rushed towards the ball of light suspended in the air in the distance.

As the blood beads sank into the ball of light, a golden light erupted from the ball of light, enveloping Niuniu's body.