Traditional storage Wizardry Tools had to rely on external physical objects to house space.
Rings, belts, bracelets—no matter how their appearance changed, they were essentially made by refining a piece of Void Crystal or some other spatial material into a fixed spatial container that could be carried around.
The container itself was an external object, which could be stolen, robbed, destroyed, or tracked.
Even with blood-binding or a soul imprint, as long as the opponent was strong enough, they could still crack it by force.
But the scheme proposed in this notebook was different.
It bound the independent space directly to one's own mental power, using oneself as an anchor without needing any external objects.
The personal space would no longer be something housed inside a ring, but would instead become a part of the wizard themselves, bound to their mental crystal, their soul, and their very existence.
No one could steal it, and no one could rob it. Unless they refined his entire body into a Wizardry Tool, there was absolutely no way to strip away his personal space.
Ethan's hand had already slipped into his storage ring.
Eight hundred magic crystals.
When he had spent 108 magic crystals to buy the ring on his finger, he had felt the price was quite fair. A space of ten thousand cubic meters, expanded to ten million cubic meters after stacking his Void Space passive ability, was enough to last him a long time.
But if the contents of this notebook could really be researched and realized, things like rings could directly retire.
It was only eight hundred magic crystals. He had to buy it.
Once missed, such unique knowledge might never be encountered again in this lifetime.
The early research notes of a Fourth-Tier Spatial Wizard likely recorded the prototype of a theoretical system. The inspiration and ideas contained within were far more valuable than a mature wizardry model.
Even if he couldn't figure it out anytime soon, the theoretical derivations inside regarding spatial coordinate anchoring and stability maintenance alone were enough to elevate his spatial knowledge reserve by several tiers.
There was no waiting, no hesitation.
Ethan paid the money and took the item directly.
Faced with such a great opportunity, who would dare to hesitate?
That would just be insane.
Ethan continued to stroll.
《Deep Stable Construction of the Mental Sea》, containing thirteen construction schemes.
130 magic crystals.
Purchased.
He walked up to another display stand.
《Energy Conflict Resolution Schemes in Cross-Attribute Alchemical Synthesis》, 97 magic crystals.
Purchased.
《Guidance and Control of Large-Scale Energy Particle Flows》, 115 magic crystals.
Purchased.
Purchased.
Purchased.
Anything involving fields he currently needed or might need in the future, he purchased them all.
However, he only bought this small portion of knowledge.
Ethan knew what he was doing.
Since entering the fifty-fifth layer, the magic crystals he had spent added up to over ten thousand.
For any First-Tier Wizard of Blood Bone Tower, this figure was enough to bankrupt them thousands of times over.
Even the net worth of the Second-Tier Deans might not be much more than his.
This was enough.
Ethan swept the final knowledge scroll into his ring and walked toward the transfer node.
If he kept buying, no matter how strong Jingyuan Academy's shielding was, someone would inevitably notice a First-Tier Wizard swept-buying goods like crazy.
He pressed his access permit into the slot on the side of the transfer node's crystal display.
“To the fifty-fourth layer.”
The runes on the crystal display flashed, and a pale gold pillar of light welled up from the ground, swallowing him whole.
When his feet touched solid ground, the surrounding scene was no different from the fifty-fifth layer.
It was the same spacious hall, the same rows of independent display stands, and the same energy light patterns slowly circulating on the dome.
The only difference was that the display stands were a size smaller, each measuring only ten meters square.
The knowledge carriers sealed inside the light membranes were also noticeably fewer than upstairs. It took several adjacent display stands combined to match the inventory of a single stand on the fifty-fifth layer.
But the items here were not bad.
The fifty-fourth layer was also a high-end knowledge area, just a tier lower than the fifty-fifth.
For a First-Tier Wizard, the items here were actually more practical.
Ethan walked along the pathway between the display stands.
《Deep Penetration Techniques of Wood-Element Particles》, 30 magic crystals.
Purchased.
《Precise Control of Energy Particle Concentration in Plant Acceleration》, 25 magic crystals.
Purchased.
《Seven Improvement Schemes for Thorn-Type Wizardry》, 42 magic crystals.
Purchased.
He spent over a thousand magic crystals on the fifty-fourth layer, sweeping through all kinds of elemental knowledge he could use.
Then, he continued sweeping downward.
The fifty-third layer. The fifty-second layer. The fifty-first layer. The fiftieth layer.
The items on each layer were slightly cheaper than the one above, and the stock was larger.
Starting from the thirtieth layer, the knowledge carriers on the display stands were no longer independent individual treasures, but were stacked in bundles and piles within the light membranes.
Hundreds of beast-hide notebooks, rows of bone slips, and sealed crystals chained together were laid out on the tabletops like inventory in a warehouse.
The prices were also cheaper.
The vast majority were priced under ten magic crystals, with only occasional items marked at twenty or thirty magic crystals, which were already the most expensive on these layers.
Ethan did not buy blindly just because they were cheap.
For every knowledge carrier, he would first glance at the summary on the crystal display and only buy if he confirmed it was useful to him. If it was useless or temporarily unneeded, he skipped it directly.
High-level theories on the wood attribute? Buy.
Introductory textbooks on composite elements? Buy. Purification techniques for alchemical materials? Buy.
But what he bought the most of was foundational theory.
Although Blood Bone Tower's library also had a large amount of basic knowledge, the foundation of a Three Rings Academy was ultimately limited.
With over fifty thousand Three Rings academies gathered at Jingyuan Academy, the unique theoretical foundation of any single academy could be worlds apart from another.
He had too many classes to catch up on.
Time passed as he swept through stall after stall.
When the twelfth transfer node disappeared behind him, Ethan stood at the entrance of the third layer's trading area and looked up at the runic clock floating overhead.
He had already been in the trade fair for nearly three hours.
The knowledge scrolls, bone slips, beast-hide notebooks, and sealed crystals piled together in his ring numbered at least seven or eight thousand upon a rough glance.
He had spent less than thirty thousand magic crystals in total.
The bulk of this had been spent on the layers above the fiftieth.
From the twentieth layer down, the most expensive items were only a few magic stones each, and the cheap ones could be taken away for just a few gold coins.
Sweeping all the way down to the first layer, the consumption rate of magic stones actually slowed down.
The most expensive things were always more ridiculous the higher up they were. No matter how large the transaction volume at the lower layers was, the price ceiling was fixed.
But for a First-Tier Wizard, this basic knowledge and materials at the bottom were actually more practical.
On the first layer, he even saw a few poor wizards who couldn't get change for their magic crystals, and in the end, they could only take out magic stones to pay.
There was also a stall owner selling alchemy materials who, unable to make change for a single magic crystal, simply stuffed in a few extra bundles of medicinal herbs as a bonus.
It was about time to head back.
After all, his harvest was already sufficient. Buying any more would indeed draw too much attention, which would outweigh the benefits.