The electric motor finally stopped running on the afternoon of the fifth day.

In other words, a single "Dawn I" could power a large electric motor for five days, and if used intermittently, the working time could be extended even further. The copper core that had lost its magneto-electric effect could be enchanted again, making it a low-consumption, pollution-free, and recyclable green energy source.

Its drawbacks were also obvious. Each enchantment required the combined magic power of Anna, Mystery Moon, and Speer. Even if the three of them produced one "Dawn I" per day, it would only be enough to keep five electric motors running (without turning them off). And Anna was still irreplaceable in the town's precision machining and steel smelting. Although Roland had tried his best to transfer most of the manufacturing to ordinary townspeople, the production of revolving crossbows, bullets, and other items would immediately dry up without Anna's manufacturing and maintenance of machine tools and material supply.

Not to mention that the 152mm fortress guns, new light weapons, and his various ideas all needed Anna to realize them, so he couldn't accept her spending all her magic power on charging batteries.

Roland leaned back in the high-backed chair in his office and sighed deeply.

To overcome this shortcoming, the solution undoubtedly lies in two aspects: First, continue to increase the duration of "Dawn I". This requires a larger source of magic power or an increase in the number of contributors. Unfortunately, the Duchess's magic power channel was already struggling to transport Anna's magic power alone. After completing the charging, she was almost physically and mentally exhausted, and it was impossible to have a few more witches to supply Mystery Moon. This problem could only be solved by Speer slowly adapting to it—after all, as a lord, she probably wouldn't concentrate on studying how to improve her abilities.

The second point was to replace Anna with other witches. Compared to Anna, Soroya, Agatha, and others who were busy with work, most witches would not exhaust all their magic power every day. If the remaining magic power was used to make magneto-electric core columns, it would be a feasible method.

As long as the total amount didn't exceed Anna's share, Speer should be able to persist—she had said before that the magic power channel was not a one-to-one transmission and could connect multiple people at the same time.

Roland wrote this idea down on paper. As for who had more magic power, who had less, how much to use each day, and how much to leave, it could all be handed over to the Witch Union for statistics.

Wendy, who was deeply trusted by everyone, was undoubtedly the most suitable candidate.

After solving this problem, the next thing to consider was how to use this brand-new energy source.

Obviously, unlike the steam engines in the factory that could produce four or five units a month and could be used by simply adding water and boiling it, the number of terminal conversion machines was meaningless due to the limited number of "Dawn I". Based on the current level of magic power, he estimated that the town could only maintain three to four terminal machines at most—whether it was used as a power source, to boil water, or to light electric lights, and to ensure stable system operation, it was probably only possible to specialize in one thing.

After thinking for a long time, Roland finally circled electric lights.

Although the power source, that is, the electric motor, has more advantages than the steam engine, such as stable speed, easy to control, and convenient for automation, the latter is already sufficient for the current power demand. He had also envisioned some high-end electric equipment, such as electric vehicles traveling between Longsong Fortress and the town, or electric airships that could be controlled by ordinary people, but the cost-effectiveness was too uneconomical—it should be known that making these machines run was based on Anna or other witches stopping work for a day.

Boiling water was even more so. Boilers and firewood could solve the problem. Even if a few more people were hired to manage and maintain it, it would be more cost-effective than consuming magic power. He was not wealthy enough to squander electricity at will.

And lighting has many meanings. Not to mention that a stable and clean light source can greatly improve the happiness of residents, it also provides them with better conditions for studying at night. Not everyone is willing to go home and continue reading by the dim candlelight after a busy day.

Moreover, capturing the legendary power of lightning and providing it to the people is of great benefit to breaking superstitious ideas and improving scientific spirit. This is probably the most intuitive understanding of the application of electricity for the people. Even if airships and electric vehicles look incredible, they are far from them.

In addition, the most important point is that the weak light of candles cannot meet the needs of night production at all. With electric lighting, factories can maintain production even at night, and if necessary, even implement three shifts, which means that the town's work efficiency will be further improved.

After determining the direction of development, a series of problems need to be solved to achieve this goal: such as light bulb manufacturing, line erection, power supply plan, and electricity promotion.

However, these can be considered slowly later.

Thinking of this, Roland called Wendy.

"You mean, to collect statistics on the daily magic power consumption and remaining magic power of the sisters, and transfer it to Mystery Moon according to the plan?" Wendy asked after listening to his description.

"Well, those combat witches with fixed tasks don't need to be counted," the prince nodded. "What do you think?"

In essence, it is to use the remaining magic power after deducting ability exercises, task consumption, and emergency preparations to guarantee the manufacturing of "Dawn I". This can not only make full use of the witches' power but also strengthen the exercises, which is of great help to the magic power improvement on each Awakening Day.

"I think Hummingbird and Echo will be very happy," Wendy smiled. "In this way, they can also play the same role as Anna. However, how should this margin be measured?"

"Let's use the balance magic stone to determine it. This is a common method used by the former Union."

"Yes, Your Highness." She bowed slightly. "By the way, today is Lucia's coming-of-age day. Should we gather all the members of the Union to spend it with her tonight?"

Roland was stunned. "Ah... I forgot if you didn't say so."

"You have too many things to remember," Wendy said softly. "I have recorded the growth history of each sister in a notebook, so that nothing will be missed."

After Anna passed the Awakening Day, Nana Wawa, Lightning, Echo, and others also passed their "second birthday" one after another, but the significance of the Coming-of-Age Day is even more profound. It is a special Awakening Day. Although it occurs on the same day, the magic power backlash suffered during adulthood is several times higher than usual. Before mastering the elimination of the pain of the body, this is the most difficult life-and-death challenge for witches.

Once they reach adulthood, their abilities will stabilize and they will be greatly improved. Some witches will also awaken branch abilities, which is no less significant than evolution.

"Well, I will prepare a sumptuous dinner tonight," Roland said softly. "Not only the Witch Union, but I will also spend it with her."