When Rex started his research on spirits roots he found out that without any external factor they will wither in around 12 hours
But if there is something that can provide them a required amount of nutrients then they won't wither at all… Rex made a new variant of HP potion that only focuses on providing necessary nutrients to these spirit roots and the chemical inside the cylindrical tube isolates them from the atmosphere to extend their expiry date
After all, even if Rex could preserve them now there will definitely be an expiry date for them and once their expiry date arrives he could easily change them because they are attached to a disposable part and he doesn't lack spirit roots as long as he has enemies
Rex then focused on making machines that can mimic the process of a human body absorbing spiritual Qi, the machine he made was just like an artificial heart machine… it absorbs spiritual Qi in the atmosphere using a variant mini-Qi gathering array made using Array Circuit Tech then supplies it to those spirit roots
The spirit root than absorbs the impure spiritual Qi and refines it in a purer form… the type which is present in the dantian of a cultivator
The spirit root he used were all attribute-less types so as to not cause contradictions between elements
There were several huge Qi storage batteries below the ground of Frozen Flame City, they were placed several miles below the ground and were all connected to the Grand Spirit Array
In the start, Rex made Qi cells using Spirit Cores, they could absorb a lot of spiritual Qi and store inside them but Rex was not satisfied by that later he got an idea… spirit stones are indirectly made from spiritual Qi combining with Impurities…
Spirit Stones = Pure Spiritual Energy + Certain Impurities
Rec used this logic as his basis for new research, he made brand new chemical batteries using the impurities of spirit stone, spirit core and preserving chemicals
The body of those huge cylindrical batteries was made of an insulating substance that prohibits any leak of spiritual Qi from within…. in case all the batteries are somehow overloaded they could freely release all their spiritual Qi in the ground
Now for Energy Converter… Rex didn't name it Energy Converter because he could refine the spiritual Qi in the atmosphere nor was his main purposed to make it was absorbing energy from atmosphere but…. himself
When last time Rex supplied his Exp to the baby beast when he was still in the egg using a spirit stone vessel like a fuse, he got an idea
If other creatures can refine his Exp using spirit roots and convert it into spiritual Qi to breakthrough then why can't he use the same methods with these spiritual roots to convert his Exp into pure Qi and use it to charge the Qi storage battery to power up the Core Smart Brain and the city
He also did it with Wang Cang and Wang Xiu Ying, he realized as long as his transfer rate is stable and he doesn't lose control it's possible for him to transfer his Exp to others
The Qi converted by Energy Converter is very pure, even if he doesn't use it to supply power to the whole city.. with a little more work he could use this pure Qi to make other people breakthrough
Although it's not possible for now because he doesn't have a device that could stabilize this pure Qi when other cultivators absorb it…. just like a regulator but just because he doesn't have it now does not mean he won't be able to make it in the future
At that time how hard will it be for him to create an army of immortals…. but Rex won't do it even if he could because with his personality he won't make someone stronger enough who could bear their fangs against him in the future
That's his biggest lesson he learned in his last life that you should never make someone stronger enough that they can take your life until you are 100% sure that they won't
That's why he suppressed this idea for now until he could find a better use of it
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The tower on the mounting wall and at the castle is named as Qi signal tower…QS Tower for short
Because they use Qi fluctuation and Qi waves as a signal so he named those signals… Qi signals
The material used to make them was the same as the material used for Spirit stones if they are to be graded all the ten towers are at least middle grade spirit tools while the one at the center even barely reaches top grade spirit tool
But it's only when compared because they are not spirit tools they are the devices Rex made using Array Circuit Tech and his knowledge on crafting, they are all interconnected and depends on each other to work
They all depend on each other to work just like how a computer needs a mouse, keyboard, monitor, CPU..etc to work if we only have one of those then it won't hold much meaning only together they can become more useful
Just like that all the QS Towers, Core Smart Brain, Qi storage Batteries, Grand Spirit Array, Energy Converter, ID Cards… etc they all depend on each other to prove their best value