Marius, the commander of the Extreme Team, looked at the Duke Guard, who was stalemate several times his undead army, couldn't help but feel a little worried and whispered: "Sir, do you want your brothers to go out?"

"No." Renn shook his head.

Marius thought Rennes wanted to let the Star Destroyer fire, and soon knew that he had guessed wrong. Rennes smiled and said, "It's just right for the Duke Guard to practice, accumulate more combat experience, and grow up quickly. If the Lord of Death wants to fight a war of attrition with us, it depends on who can afford it."

"Sir..." Marius's face suddenly changed slightly. Rennes actually wanted to fight a war of attrition with the undead, which was too unwise.

He was about to persuade him, but he was interrupted by Renne's wave.

"I know it in my heart."

"If things are wrong, I will let the Duke Guard retreat."

Renn was helpless and could not say that this was exactly what he wanted. He was just right in his mind to fight attrition and could harvest electricity frantically.

Marius felt relieved.

In the following days, the Duke Guard and the Knights of the Holy Lance only advanced less than five miles and paid some casualties. However, tens of thousands of undead were destroyed by fire every day, causing Renn's soul power pool to rise again and again, and he all turned into soul drills.

Most soul diamonds are used by Rennes to expand the pixel world.

Tens of thousands of soul drills were put into use, and the length, width and height of the pixel world were widened to 30 meters, and the space volume reached 27,000 cubic meters!

This is already very big.

Rennes stopped expanding the pixel world and then put the power into the heart of the main brain.

For half a month, the Duke Guard advanced for about 30 miles. Rennes invested 200,000 grids of power, increasing the master's mind from level 12 to level 13, and doubled the number of souls that could be created again to reach 32,678!

In this upgrade, the heart of the master brain did not push up the upper limit of the Thunder Forged Heavenly Soldier, and it is still the legendary middle level.

"It should be upgraded a little more."

Renn tried it and was shocked to find that the master's mind had increased to level 14, and the amount of power needed was about one million grids!

He took a breath of cold air, which was too exaggerated.

However, with the current situation, one million grids of power seems to be unattainable. As long as the army of undead fights another half a year of attrition, it should be enough. However, so much power is just to increase the heart of the main brain by one level, which is too wasteful and has extremely low cost performance.

"Forget it, more than 30,000 soul divisions are already used up."

Renne gave up decisively.

He turned to use the power to create Thundercast Heavenly Soldiers, and tried to increase the number of Thundercast Heavenly Soldiers by the way, and let the twelve mage clones build more magic models, the more the better, increase their strength, and start to attack the great mage.

The number of complete bodies of the Dark Angels also increased to one hundred.

At the same time, many soul diamonds in the pixel world were also stored. Rennes gave a batch to Oshylia in the Dragon Valley, allowing her to create more iridescent dragon clones.

Every day, Renne's strength is growing rapidly, which is more efficient than the bottomless abyss harvesting the demon soul, making him a little intoxicated.

Rennes thought that this war of attrition would last.

However, one day a month later, the endless army of undead suddenly retreated.
Chapter completed!