The spa itself is one of the by-products of the project that Luo Ming and Pelodiana have worked on.

Although this world does not have developed technology, it has a variety of spells, in fact, in Luo Ming's view, the spells in this world could have been classified as a kind of "technology" - that is, the technology to study the laws of the world and use it.

This difference arises because the two worlds are fundamentally different.

In some ways, the lack of earth technology did make it inconvenient for Login to be inconvenient, but in others, he found that some spells could be simple and cheap to do things that would be cumbersome in the 21st century.

For example, using spells to detect other people's mood changes.

Of course, if emotions can be probed in detail, it will almost reach the realm of mind reading, which is completely taboo in today's civilized world.

This is not simply a moral taboo, and all countries have written their laws to resolutely combat it, and even the major churches have issued instructions from the Inquisition to consider it a dangerous heresy.

If someone uses such a spell, even if it is purely for research, as soon as it is exposed, they will be severely punished, and they will basically only die, and even relatives and friends will be greatly implicated, and the inquisition court will investigate and even torture them in detail to prevent the spread of this spell.

So on the bright side, this spell has been lost.

Even those who are mentally prepared to break the taboo will hardly find any information to refer to, so they have to start from scratch.

Although there is information on this forbidden technique in Ayana's extensive database, the casting itself is not easy, and the cost is not small, and the cost is too high to use it for research.

What Luo Ming used this time was just a spell to detect superficial emotions - roughly sensing the level of joy, anger and sorrow of others.

And this spell also has many constraints, for example, its sensitivity is not enough to detect the kind of sudden emotions that flash in an instant, and if the other party is quiet, or self-control, vigilance, the effect of the spell will also be reduced, if there is too intense emotion, it is difficult to calm down, it will cause a huge interference to the detection results, making it easy to misread.

This kind of spell is difficult to use in the practical field, so it seems to be more out of the way.

Due to its mediocre effect, this is considered a mild side-rubbing, on the same level as lie detector spells, or legion spells that boost morale and dispel fear.

With Luo Ming's current status, even if someone is caught using this spell, he will generally be turned a blind eye.

Even if he had gone too far, and if it was too explicit, the Inquisition would only have warned him - this was because the spell didn't look like it could cause serious consequences.

Luo Ming used to consult Aya's huge database when he had free time, and Aya often checked it herself, in short, he wanted to take out some valuable knowledge from it to use.

And in the process of "searching for what means of rubbing the edge", Luo Ming stumbled upon this spell, and on a whim, he used it in the hot springs.

Soaking in a hot spring is a gentle and soothing treat, and generally speaking, the mood of the person soaking in it does not change suddenly, and the nerves are not tense when resting in the hot spring - so the spell works properly.

According to the feedback of this spell, Luo Ming made minor adjustments again and again, including the temperature of the hot spring, the flow rate of the water, the duration of the bath, the size and number of people in the hot spring pool, the surrounding landscape, and the food provided.

As a result, the comfort level of the hot springs has risen again and again, reaching an extremely high level.