Eventually, Benjamin carefully put away the ginkgo biloba and returned to the lab thoughtfully.

Morris doesn't seem to know much about this key, but the heritage of the church ...... It was something he never expected.

Could it be that every church can use it to draw very great power from the elemental plane?

It was hard for him to imagine how this could be done. As far as he knew, it was only him and the fourth-generation pope who opened up the space of consciousness to meditate, and the others were all learning divine arts in a normal way. There's no way they're going to get into the elemental plane and steal some mess out of there, just like Benjamin did?

And, even more surprisingly, the church has fixed this as a regular tool.

It is conceivable that Grant has such a strong strength as he is now, and perhaps he has inherited some strength from the so-called "divine realm", so that he can be worthy of Benjamin's extremely advanced meditation methods and the bonus of various adventures, otherwise, he should not be as strong as he is today.

Benjamin now knows why the church is willing to make such a big deal of money in order to recover the key, which is their lifeline, right?

He pinched the ginkgo biloba leaf in his hand, and he couldn't help but feel a little nervous.

Now that he's back in the academy, he's also lifted the forbidden blister wrapped around the leaves. The church should be able to find out the general orientation of the leaves by some means, and they ...... And I will never give up.

At that moment, Benjamin pulled out the sound transmission wood and passed on a message to his contacts in several other countries. They must warn the king and the generals that the Church may at any moment cross the Crussard Gate and march out to take them by surprise.

After delivering the news, Benjamin was a little relieved, but still a little hesitant.

What should he do with this ginkgo biloba?

Morris told him that the leaves of the Tree of Time had undergone a special process to make a special beacon. This process is very special, after it is completed, the key can only open one door forever, and that door will always recognize only this key. If Benjamin destroys it, the Church will have to build another door of its own, or their legacy from the elemental plane will be sealed forever in that unexplored room.

For Benjamin, this leaf doesn't really have any real purpose, that is, it is disgusting to hold it in his hand, and under certain conditions it may be able to be used as bait to set a trap or something. But if you destroy it...... For the church, the blow was absolutely devastating.

Is he going to ruin it?

"Why destroy it, just take it, and the church will come to your door, how fun!" the system popped up and said in an idiotic tone.

Benjamin shook his head, ignoring its words.

He understands very well that the system is using irony to persuade him to destroy this hot potato. It's just that he also knows that even if the key is destroyed, the church under the wrath is not without the possibility of sending an army. And he held the key in his hand, barely a hostage, and the church might hesitate a little.

In a word...... He didn't really want to ruin it like that.

To destroy it is to destroy the secret of the Church's power from the elemental plane. It was a secret about the origin of magic, and Benjamin wondered how those people did it. Maybe one day he will be able to enter St. Peter's Basilica and open that door with his own hands?

He realized that he was going to die at this thought, so he was relieved.

Didn't you come all the way by fancy work?

Eventually, Benjamin harvested the ginkgo biloba and kept both hope and bane at the same time. He closed the door to the lab and continued his research on the world of the dead.

"How's it going? Did you find anything special?"

"This ......," a puzzled look appeared on the mage's face, "I have measured the remains by various means, but the results have been very disappointing. There is nothing special about these remains, some are animal corpses, some are human corpses, just ...... It's just an ordinary corpse. ”

"I know. Benjamin nodded and said, "Legend has it that the undead are all corpses, too?"

"But it's hard for us to study them. ”

Benjamin touched his chin and asked, "So what do you mean...... You need to catch a 'living' undead and come back, so you can study something from them?"

The mage sighed and said, "I can't guarantee anything, but now that we're in this situation, it's really hard for us to make progress. ”

"Hmmm......"

Benjamin nodded, and it was hard to refute anything. In fact, the system has scanned the wreckage and found nothing out of the ordinary. After being beaten to the point of incapacitation, this carrion has truly become a puddle of ordinary carrion.

The force that makes the carrion move, the system can't detect it, and Benjamin can't sense it. And it seems that these researchers also need some better samples to make progress.

Therefore, he also began to think about the "undead ** capture plan" in his heart. However, at this moment, another voice came, suddenly planning his thoughts.

"Who said it was just a bunch of ordinary corpses?"

Benjamin and the mage turned their heads, only to see the old man with a disdainful face.

"It turned out to be the head of the Potions Department. The mage nodded, then looked puzzled and said, "Could it be ...... What did you find in the wreckage?"

The old man snorted unrecognizably and said, "I have found something strange. ”

"What is it?" Benjamin's eyes lit up, and he hurriedly asked.

"There is a strange residue in the remains of these undead. "It's like the blood of some kind of creature, mixed with the flesh and blood of the corpse itself, and it's very difficult to detect. It was also after I used the special reaction between the various drugs to evaporate all the blood of the corpse itself before I found such a small residue. ”

As he spoke, he took out a small bottle, which contained a strange black-purple liquid, a very small amount.

"That's the residue that I've tried to distill. He continued, "It's a very troublesome thing, and I consumed an unknown amount of precious materials to extract it. ”

Benjamin looked at the bottle of unknown liquid and couldn't help but show a look of surprise.

He didn't expect that the old man's efficiency could be so fast, and within ten minutes of going out to talk to Morris, he had studied the secret of the undead.

"Is this the secret that makes corpses move......" He cautiously took the bottle of liquid, trying to sense it with the water element.

However, he didn't feel any elemental anomalies or magical fluctuations.

"Let's check what the ingredients of this bottle of liquid are all about?" he hurriedly commanded the system, and the system didn't seem to need him to ask, and it had already started sensing at the same time as him.

Therefore, the answer came very quickly: "It's a terrible thing, the main ingredient is mixed blood, but not even the slightest bit of bacteria is in it." And...... There was something I couldn't deconstruct, an air of death, and my body felt an instinctive fear. ”