The mark is located in the center of the trunk of the tree, in the shape of a water wave, six zigzag water waves, divided into three layers, each layer divided into two, arranged in such a way that it looks like a moving puddle of water.

The marks are not large, all of them are not the size of a palm, and the six traces in the shape of water waves are all in the shape of grooves.

"It seems that we need to find an object that matches the size and shape of these six waves in order to fit this mark. The unicorn lion stared at the mark and said.

"You mean that this is something similar to a trap, and that the black trunk can only be opened if you find the six keys in the shape of water waves?"

The black ring may have something in common with the trunk.

After hearing this, the unicorn lion nodded, and said directly: "That's right, you see, these six traces have not been found in other parts of the trunk, and the trunk is so hard, so I suspect that this trunk is not a real trunk, but just a special container, of course, a special container needs a special key to open, these six water waves, is the groove where the six keys are placed." ”

"In that case, doesn't it mean that this thing of the black dragon may really be a treasure?"

It's the same with other people, after all, people are curious about unknown and new things.

"Let's find out the six keys. Crazy Shura said excitedly.

"According to the character of the black dragon, burying a tree trunk can be covered by such a concealed means, plus its old nest has more than one, so I guess that the six keys must be in another lair of the black dragon, let's remember this first, and go find the next lair. "The unicorn lion is getting to know more and more about the character of the black dragon.

Since there was no trace of demonic beasts and human activities in the Burial Demon Valley at all, the black trunk was left here, and everyone was not worried, so everyone immediately set off and continued to search for the periphery.

Three days later, everyone who had been busy for a long time finally had a harvest again.

In a depression, overgrown with vines, which spread into the nearby silt and swamps, which bear fruit, are ripe for this red fruit, so that the surface of the silt and swamp is full of fruit.

Originally, no one thought that this would be one of the habitats of the black dragon, or the little guy was greedy, and when he saw these red and bright fruits, he shouted for Lin Xi to help him pick them.

Lin Xi then performed the Douqi Transformation Move, stepped on the red broadsword, flew to the top of the swamp, picked up a vine and pulled it out, trying to pull the fruit hanging from the vine back to the shore.

At this moment, the vines kept pulling and pulled out a small black wooden box!

The small wooden box was tied to the top of the vine and had been buried in the mud.

If it weren't for pulling the vine all the way to pull the fruit ashore, Lin Xi wouldn't have been able to discover the abnormality of the vine.

Moreover, there are no less than 100 of these identical vines on the swamp, but Lin Xi chose this one, which can be regarded as luck.

When I opened the small wooden box, I was surprised to reveal six silver keys in the shape of water waves!

Madness Shura couldn't help but sigh: This black dragon is really cunning, it used dead mahogany as a habitat marker, and now, it uses this vine!

The little one held a big delicious fruit and nibbled on the side, shaking his head, squeezing his eyebrows, and calling triumphantly to Linsy.

There is no doubt that this time you can find six keys in the shape of water waves, the little one should be the first to remember!

"Sometimes luck is a mysterious thing, and if it weren't for you and the little one, we wouldn't have paid attention to this ordinary vine field. "The unicorn lion is obviously spiking.

If the black dragon is still alive and knows that he has worked so hard to bury the key, he was actually discovered by a fat penguin, I don't know if he will be so angry that he vomits 3,000 liters of blood!

After finding the key, the group hurried back.

The black trunk still sits on the ground, showing no signs of movement.

Lin Xi carefully placed the six silver keys into the grooves in the shape of six water waves, one by one.

When the last key was placed, the palm-sized mark suddenly erupted in a dazzling silver glow!

Apparently, the trap was turned on and the black trunk was activated!

Then, this dazzling silver light quickly spread towards both ends, enveloping the entire huge tree trunk!

At first glance, it looks like a huge horizontal pillar of silver light!

Immediately afterward, when everyone was still feeling incredible for this magical scene, the silver pillar of light exploded like a big firecracker, and what appeared in front of everyone's eyes was a large silver light curtain of activity!

"How water-like!"

Lin Xi couldn't help but feel like he was in the ocean as he looked at the large area that was constantly shaking gently like the sea lapping against a reef.

And that's not all.

Immediately, the silver light curtain was completely transformed into a blue light curtain!

It's like a real big blue ocean surrounding everyone!

This scene is indescribably beautiful!

No one spoke, but while everyone was surprised, they were also curious, why did the six keys produce a series of magical changes after opening the black trunk?

This is like an ocean scene, what kind of treasure does the black trunk represent, and is there some connection between the two?

While everyone was thinking about these questions, there was a loud "bang" in the blue ocean, and then a "crunch" sound came out, like a door slowly opening.

The blue light curtain disappeared, and everyone could see what was happening inside.

It turned out that the black trunk of a tree with a diameter of 100 meters was pulled out of the middle!

The black giant tree has finally opened!

When all movement stopped, a space resembled the cabin of a large ship.

This space, with a diameter of 100 meters and a length of 150 meters, is completely the space inside the hollow trunk!

Moreover, under the blue sky and white clouds, bursts of golden light suddenly appeared!

A lot of yellow gold, gold coins and other things are piled up inside!

It is rumored that the dragon clan loves to collect all kinds of treasures, especially golden things, and now it seems that such rumors are not wrong at all, at least the black dragon in front of him is like this, and I don't know where it got so many gold coins, anyway, the whole space is a large piece of golden light.

"Look here!"

At this point, Linsey pointed and slid to the surface of the tree trunk on one side.

I saw that the palm-sized mark was no longer a groove in the shape of six water waves, but was replaced by four big golden characters: Noah's Boat!