The materials refined from the black fire oil, combined with the effect of the Fire Spirit Dragon Candle, can make the war machinery not waste so many precious crystal sources...

Moreover, with Tan Chu's current belongings, the more than 700 pieces of Ink Crystal Spirit Source he saved were not enough for a war machine to toss for a long time.

But now the situation is different, there are so many black oil oils, and the fire spirit dragon candle is also ready-made...

"Elder, is the thing you said about being refined from black fire oil?" Tan Chu asked excitedly.

"Lord Governor, do you know this thing?" The Great Elder looked at him in surprise.

From his expression, Tan Chu understood that his guess was correct, the material that could replace the Ink Crystal Spirit Source to drive the war machinery was undoubtedly the blazing black oil!

"Elder, tell me, how does the Fire Spirit Dragon Candle and the Blazing Black Oil drive these big men?" Tan Chu hurriedly asked.

"It's easy, you come with me." The Great Elder led him to the front of the stone booth.

He climbed the stone stairs up the ladder and stood at the top, gently pressing the trap behind the back of the war machine...

Tan Chu immediately saw that behind the tall mechanical warrior, a square hole immediately appeared...

"Lord Dudu, this is the place where the power source is placed for the war machine, you just need to pour the blazing black oil into it, then use your Fire Spirit Dragon Candle to light it from here, then close the mechanism, and the divine fire will burn in it, providing a steady stream of power for the war machine." The Great Elder said.

I'm dizzy... Isn't that the same principle as the engine?

"Elder, how long can you keep these things running with a single fill of black oil?" Tan Chu asked with a smile.

Knowing the resources needed, he doesn't have to worry about it at all now...

Xiao Fei is leading the mechanics to collect and refine this black oil, and should be able to save enough resources to provide energy power for these war machines.

The only thing he doesn't know now is how much black oil it takes to launch a war machine, and how long can it last?

"They need a barrel of blazing black oil for every hour they run, and if you have more resources, you can fill it with a maximum of three barrels of black oil at a time." The Great Elder said.

"I see, it's that simple." Tan Chu was finally relieved, he could still afford this kind of consumption.

"Simple? It's not simple at all, we just found a way to replace the crystal source, but only the resources of Black Oil No. 1 are useless, and you must have this divine fire in your hand to exert great power to make the war machine work, and the general fire source has no effect at all. The Great Elder said helplessly.

"Oh... I understand that feelings must be burning in it in order to activate these big men! Tan Chu finally figured it all out now.

Looking at the divine candle emitting red fire in his hand, he felt more and more that he was so lucky to get this prop in the first place...

Not only does it illuminate, but it also attracts the hatred of the little monsters...

However, after entering the advanced map, the ability of the Divine Candle to attract monsters is almost limited and cannot be used, and it has gradually become a tool for ordinary lighting...

But now, the power of the divine fire still exists, and it only needs to be used to ignite the black oil, which can excite the energy hundreds of times, thus replacing the powerful but very rare crystal source ore, which is really a good deal!

"Can we try it now?" Tan Chu asked excitedly.

"Don't be here, we can't afford to be tormented by the war machine here...", the Great Elder hurriedly waved his hand and refused in a panic.

"Lord Du didn't know that when we first experimented with the power of these war machines, because we didn't know the situation, we used up a hundred pieces of ink crystal spirit source here, but we caused a lot of trouble, and our treasure trove of hidden soldiers was almost destroyed in the hands of this kind of guy." Elder Iron Army explained.

"No, they're that powerful?" Tan Chu was shocked.

"You don't have to doubt the power of a war machine, a war machine is enough for you to deal with tens of thousands of evil soldiers, but... Because black oil is an alternative energy source, they will be destroyed after one use and cannot be repaired. The Great Elder shook his head and sighed.

Yes...

This situation not only surprised Tan Chu...

It turned out that using divine fire and black oil to replace the crystal source still had such side effects!

In other words, a war machine will be scrapped after only three hours of use...

"Okay, I see, how many war machines are the elders going to send me?" Tan Chu asked with some regret.

"Ten units, enough for you to defend the city." The Great Elder pondered.

"Isn't it, it's only ten? Elder, don't forget, my Shadow City is tasked with killing all enemies and attracting hatred, and if you only give me that, I can't guarantee that I will cooperate with your rescue plan. Tan Chu shook his head and said.

"Then how much do you need, these war machines are all powerful killing machines, you haven't seen their power, don't think ten is very few." The Great Elder was speechless.

"At least give me a hundred, so that I can be sure to deal with those evil clan legions, and you must know that the number of evil clan soldiers attacking the city this time is at least not less than 300,000." Tan Chu said.

"Lord Governor, even if you are given a hundred units, do you have enough resources to drive them, and if you do, I will promise you immediately." The Great Elder said helplessly.

"Three hundred barrels of blazing black oil is very simple, and I will have at least ten thousand barrels in my warehouse by tomorrow." Tan Chu laughed.

"Ten thousand barrels!" The three elders' eyes widened in surprise, startled by the number he said.

"Elders, don't forget, my city is built right next to the Black Fire Oil Vein, and it's not a piece of cake to get some of these resources." Tan Chu explained with a smile.

"Big brother, it seems that what Lord Du said is right, his city, the address is right next to the black oil mine, and it is very close to the location of our secret passage." Elder Iron Soul said.

"Yes, big brother, maybe we can borrow that city in the future and use it as a base for our secret development, avoiding the surveillance of the evil clan." Elder Tiejun said excitedly.

"Okay, Lord Governor, I promise your request, a hundred is a hundred, you can take it." The Great Elder pondered for a moment and said as if he was in a very painful state.

"Thank you very much." Tan Chu said excitedly.

With an unceremonious wave of his hand, he gradually collected the tall mechanical warriors into the package...

Bite... System: You get a special mechanic item [Gears of War]!

Bite... System: You get...

．．．

He walked all the way along the long stone platform, and in the flash of red light, all the tall giant mechanical warriors disappeared without a trace...

In a short time, a hundred war machines had been placed in his Sky Swallowing Secret Bag!

However, the greedy Tan Chu didn't plan to stop there, he continued to wave his hand, wanting to take one more a...

Bite... System: Sorry, you don't have the right to pick up this item!

．．．

Well, you can't take advantage of it.