Add-ons are categorized in ranks and qualities. While the rank indicates the level of the world that can support that add-on and its overall power, the quality indicates the optimization of the add-on and its functions compared to other add-ons of the same rank. The ranks go from rank 0 up to an unknown limit while quality goes from F- to S+. While the rank marks the difference in the overall power of the add-on, a great difference in quality could make a lower rank add-on be better than a higher one.

While there are multiple ways to improve the quality of an add-on, the best way to do it is to fuse some sub-add-ons (or a sub as they are colloquially called) that are compatible with the base so it can fix the weak points that an add-on could have.

—Extract from the Builder’s Magazine #4, “How to categorize Add-ons”—

Back at the café, Axel was talking with his friends about what should be his next move.

"Well yes, cultivators have appeared in your world, so what?" William asked. "Even if you still have three islands where humans can still live, they will probably become zero in no time. When the animals start reaching the next stage of their evolution, they will obliterate your cultivators in no time. Humans need more room to grow, they can’t be caged in a few islands, they need to exchange information and techniques to grow and develop, even more with the rules that you have used to create that add-on."

"And I bet that the seas of your world are already infested with water beast so no opportunity for a long sea voyage," Adam said supporting William's words. "You better find a way to help those people interact with each other and become stronger or their effort will be in vain."

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"So, what should I do? Should I create some new add-ons or what?" Axel asked.

"It’s a possibility, but if you have created one a few hours ago your energy levels shouldn’t be high enough to make a great difference, mainly because it shouldn’t have recovered as much as before because of the consumption of your cultivation add-on. I think your best chance would be to spend some money and buy some new stuff online", Adam answered. "In the Guilds website, there is an official market where every item is verified so no one would scam you."

"Yeah, it’s a nice web to buy something to tune up your world. Every seller is a licensed member of the guild and every item has an official evaluation with its rank and quality and some even have their pros and cons listed in the description. There is even a tool that helps you to find add-ons and subs based on a test that find your necessities at that moment", William continued. "It’s definitively a great way to learn and get some cool stuff when you are beginning to world build."

"I see, I would go to my house and search for something that deserves all my savings", Axel said while he turned to go home.

"Wait where you are," William said while he held Axel’s arm. "Where do you think you are going? You haven’t been here even for five minutes. Do you think it’s alright to come here, ask for tips for your world and then leave without even asking us about our lives?"

"Well, you know. If I don’t go, my world will become a wasteland where only beasts live, and I cannot accept that" said Axel while clenching his fist.

"I see. Then I will gift you something." Adam said while putting his hands together.

"Let me help you," William said while he did the same.

When they spread their hands, two tiny crystals fell on the table. They were so small that they were even hard to see.

"Here you are," Adam said smiling. "This is a little present from both of us. It’s a bit of energy from our worlds. If you absorb it, you can create an add-on that allows you to pause your world. Those kinds of add-ons are very cheap to create and are easy to fuse with other administration add-ons. Like that, you shouldn’t have any problem staying a few hours talking with us."

Like that, Axel found himself forced to socialize with his friends before he could go to his home and began his shopping spree.