"I really can't do it!" said Victor, the driver, with a rogue expression of "burn if you want".

"Don't play tricks!" Lukka said. After the excavator's sudden stop and spin just now, he now had no doubt that as long as he slackened a little, the little green dwarf would immediately seize the opportunity.

"Are you unreasonable?" Vic exclaimed excitedly, waving his hands and feet together, "It's a machine! It's not the elemental energy that those elves play with, and the operation of the machine must follow the principles of engineering, right?"

"Just talk, don't dance!" Ollie tapped the tip of his sword on his shoulder, and the goblin fell silent.

Lukka looked around the cabin, then turned to Vic and asked, "Since you want to follow the principles of engineering, why can't this thing be driven back the way it came?"

Vic was stunned for a moment, as if he didn't expect the other party to be so "reasonable", stretched out his right hand and grabbed the disproportionate pointed ears on his head, pointed to the back of the manned excavator and said, "Look for yourself!"

As he spoke, he squeezed to the rear of the excavator and opened a protective shell in the inner compartment, revealing the glass portholes on the shell.

"When the excavator is operating underground, it digs up the earth and rocks from the front and transports it to the rear of the body, so that we can keep moving forward. "Also, the tail of the excavator spews out air, which is to speed things up and press the dirt and rock piled up behind it even tighter than it was original." ”

He subconsciously waved his arm again: "For this kind of machine, going back the same way or something is simply not an option!"

Although Lukka doesn't move mechanically, he can figure out the general principle. He thought for a moment and said, "Okay, you're right. But even if you can't go back the way you came, why don't you just dig a new passage to go up?"

"You're speaking lightly!" Vic glared at him, "It's such a big machine, it doesn't need energy, huh?"

"Don't try to fool people again, you can't go out with this thing, you can't bring any backup energy, right?" Lukka said.

"I've brought it! I've added 30% of the amount I need back and forth!" Vic said, "but now it's going back to the deep mines, and I can't go back to the surface with this 30%!

Lukka made an almost oblique calculation and felt that at this point, Vic should not be lying.

"And what is this energy source? fuel or battery?" Lukka asked.

If the power of this excavator can be replenished with magical energy, then nothing will be a problem. But he also knew that this should be his own wishful thinking, and these goblins had nothing to do with magic no matter how they looked at it.

"Fuel, it's dangerous! How can there be enough batteries for this excavator?" Vic dismissed both of his speculations.

"What the hell is that? Hurry up!" Lukka didn't have time to play a guessing game with him.

Vic fumbled around the wall a few times, flipped a small switch, and a metal baffle near the rear of the excavator creaked downward, revealing the power core of the machine.

Beneath the entanglement of the threads, an emerald crystal shimmered with a faint light. Although it looks crystal clear on the outside, the light looks weak, which is probably the state of running out of energy.

"That's the kind of crystal nucleus that provides the energy!" Vic said, "Do you have this?"

Lukka looked at what he called the "crystal nucleus" and suddenly felt a sense of familiarity. Immediately, he realized that this was not the "magic source" he was looking for in the Sunset Islands back then?

It's just that the crystal in front of him is not only very small, but the magic energy carried on it is also pitiful, even if it is in a state of full energy that has not been consumed, it is probably not as much energy as the energy used by him for a diamond skin. On the magic map provided by Shut Up, this thing should belong to the level where there is too little energy to bother looking for.

But even if he recognized the essence of the fast crystal nucleus, Lukka still had no way to refute Vic's words.

There is only one way for him to interact with the source of magical power: to absorb the magical energy contained within.

Absorb some of the magical energy from the outside world, channel the other part of the energy, and release it the way you want. This is the basic principle of the mage's spell casting.

It's not that Lukka can't charge other things, it's just that after his refining and guidance, the returned magical energy can no longer be in a primitive state, and is often more purposeful and aggressive, and it is not easy to place it firmly in such a small crystal, and it is not easy to combine it perfectly with the goblin conversion device.

Maybe given him enough information, plus two months of research, Lukka can do it, but now it is obvious that there are no such good conditions.

Of course, Vic didn't know Luca's thoughts, and was still boasting about the goblin technology: "Look, the energy of the crystal nucleus is perfectly converted into electricity, and the loss rate is no more than 6.3%, only a goblin can make such a perfect device!"

"Alright, don't blow it!" Lukka interrupted, "Do you have a lot of reserves for this thing?

Vic became alarmed, "What are you going to do? I can tell you, I'm not that easily threatened! Even if I rot with you in the middle of this rock and dirt, I won't take you to the warehouse where the crystal nuclei are stored! I won't let you threaten - hey! What are you doing?"

Lukka held out a finger and shook it in the air. The Illumination shone through Vic's chest again.

As the light grew brighter and redder, the expression on Vic's face quickly changed from righteous to awe-inspiring, and finally to a flattering smirk.

"The crystal nuclei are stored in the warehouses of deep mines. Deep Mine is the only main city of our goblins. The main city is the hub that connects all the mines. "Vic isn't dragging his feet at all this time.

Luca didn't let the light go away.

He stared at Vic's reddened green face and said, "Why do I think you didn't tell the truth?"

Vic still held on for a few seconds, and then he was deflated and said helplessly: "Okay, I'll admit defeat and tell you everything." Even if the energy is replenished, this manned excavator needs another condition if it wants to rush to the ground. ”

Lukka laughed and said, "It's the oblate device, right?"

Vic was taken aback, stared at Lukka and asked, "How do you know?"

Soon it dawned on him: "Oh, before the excavator rushed out of the ground, you saw Liz and they used that device to position the excavator, right?"