The crystal ball was as small as a grain of sand to the Bone Demon, but it did not hinder the Bone Demon's soul from observing.

The skull demon was apparently shocked by the wizard's magical ability to pry the rule lever and amplify the small energy to infinity.

"Okay, taking advantage of the fact that I still have some residual energy in my space-time communication altar this time, let's conduct a regular solution transaction first, this Bone Demon Lord, what do you need?"

Green raised his head, and the elemental eyes under the face of truth looked towards the bone demon, and the exchange of tokens between the two sides just now consumed a lot of altar spar energy.

The Bone Demon Soul laughed out loud in communication.

"Hahahaha, I need the bones of powerful creatures, for example...... This skull in your hand!"

The Bone Demon actually fell in love with the World Lord Skull of Grimm's Sheep's Horn Nightmare Magic Staff, which was the medium used by the Black Sota Stigmata Wizard to seal the Nightmare Shadow!

The skull of the Lord of the World, this skull demon has a vision.

Green secretly sneered in his heart, but on the surface, he said quietly: "You want my magic wand? So, what can you give?"

Green didn't think that the other party would be able to come up with something that would allow him to give up the Claw Nightmare Magic Staff, in Green's mind, the Skull of the Lord of the World and the Claw Nightmare Magic Staff were connected, and the value of the Claw Nightmare Magic Staff ......

Although he sneered in his heart, out of the basic etiquette of communicating and trading with creatures in the foreign world on an equal footing, Green did not immediately refuse the other party before he offered the price.

Distant exotic space-time transactions often represent the strengths and weaknesses of the two worlds with different rules on the distant side, and perhaps things that have no value in this world are priceless in the other world, especially when low-level creatures are trading.

Maybe the other party will be able to come up with a higher-level treasure that is willing to give up the Sheep's Horn Nightmare Magic Staff?

After thinking about it, the bone demon let out a "vomit", and Mouran spit out a soul fire from his mouth.

The flames are purple-black in color and are about two meters tall. After falling into the bone hand, it was pinched fiercely, and it was immediately compressed into the size of a crystal ball, and at the same time, a cloud of purple-black aura dissipated, turning into an incomparably pure transparent soul fire.

"This soul fire is full of 250,000 Bolun, and the value of the wheel is ......."

Green was very disappointed, for Green, who frequently participated in world battles, collecting souls was really simple, maybe for the bone demon world, souls were their standard currency, an important material to hoard, but for the vast majority of wizards in the wizarding world, it was of little value.

This skull demon seems to be a perennial being who interacts with creatures from other worlds. Extremely sensitive to Green's unhappiness, he hurriedly said, "So, what do you need in exchange?"

After thinking for a few breaths, Green said in a deep voice, "Materials that are more conducive to energy channeling, or...... Knowledge!"

"Knowledge?"

After muttering to himself, the bone demon slowly shook his head, and the other bone hand suddenly pulled out of his eye socket and took out a large piece of blue ice?

"This is a world lord who broke into the world of bone demons, after being killed by several powerful bone kings. The materials I picked up from the battle relics should meet your criteria. ”

Under the face of truth, Green's eyes grew violently at the moment when the bone demon took out this piece of blue ice.

"Extreme Cold Crystal!"

Green recognized the Bone Demon's materials at a glance.

Some of the legendary alchemy materials of ancient wizards. Extreme Cold Crystal is a high-grade alchemy material of the same grade as the Xenomorphic Essence of Grimm's Truth Face.

The more advanced the alchemy material, the more prominent the malleability requirement, so that the witchcraft can be large or small, and the changes are infinite. The melting and condensing ductility of the extremely cold crystal is almost comparable to that of the heterogeneous marrow, and at the same time, it has a high energy application of ice attributes.

Now it is extremely cold for the bone demon's palm to lift. It's like a hill to Green.

Even if these extreme cold crystals are completely released, it will expand infinitely until the end of its own cold power condensation energy, and then its size will not be determined, as if it is the size of a real mountain.

This is the ductility of Extreme Cold Crystal.

And if you collect its cold power, it is not surprising that this small iceberg of more than ten meters shrinks to the size of a fist.

Green fell silent, the energy of the altar under his feet was depleting little by little, and suddenly, Green seemed to have made a decision, and shouted in a low voice: "Deal!"

Losing the Sheep's Horn Nightmare Magic Staff, Green's combat effectiveness at this time will indeed be reduced, but if he obtains this Extreme Cold Crystal, then Green will have the foundation for making a higher-level magic staff!

In the purple-black poisonous skull eye socket of the bone demon, the soul fire beat excitedly, and then this extremely cold crystal became smaller and smaller in the palm of his hand, smaller and smaller, and after shrinking to about the size of Grimm's crystal ball, on one side, Grimm slowly pushed the Sheep's Horn Nightmare magic staff into the space-time vortex, and on the other side, the bone demon handed the extremely cold crystal from the other world.

Almost at the same time, the two got what they wanted from each other.

"Hahahaha, happy cooperation, strong man in a foreign land, I hope we have a chance to cooperate next time, I am the head of the three souls, what is your name?"

The moment the huge bone demon got the magic wand of the claw nightmare, his other hand directly pulled out the body of the magic wand, and after taking a look at the metal material, he randomly stuffed it into his eye socket, and then threw the skull of the claw into his mouth and swallowed it in his stomach.

"Shadow of Despair!"

The crystal ball-sized Extreme Cold Crystal in Green's hand was shrouded in blue cold air, but it gradually gathered under the constraints of the arc of the rules of Green's World Clothes, and then the Extreme Cold Crystal the size of the crystal ball in his hand actually shrank again, and gradually turned into the size of a fist, and was thrown into the dimensional gap by Green.

"It was a pleasure to work with. ”

With Green's words, the energy of the spar on the magic altar was exhausted, the space-time communication ended, and Green once again recovered his half-step time perception of three-eighteenth of a second.

Call......

With a light sigh, Green was in a good mood.

"It's really interesting, no wonder those creatures in the Demon Hunting Expedition World who can communicate with the foreign world are all worshiped as prophets, saints, and wise men in the world......"

Muttering to himself, Green once again became invisible under the robe of appearance, forgetting about it for a moment, and continued to look through the old wizard's book collection in the underground vault.

About five hourglass hours later.

The old wizard took the cappuccino back to this underground room, and the old wizard buried his head in the real yàn on the real yàn table, as if he was still looking for the reason for yesterday's real yàn failure, thinking that he was flawed in something.

On the other side, the little girl hummed a song, jumped up and down to the real yàn room and ignored her grandfather, and when she saw the altar in the middle of the real yàn room, she was suddenly stunned.

Cappuccino walked slowly to the altar and looked at it carefully for a while, then looked suspicious, then twisted his head and began to look around the room, as if sensing something different.

Then, the little girl walked straight to the bookshelf where Green was standing! (To be continued......