Having experience in leveling up means that this Pandora's Box can be upgraded. It is almost self-evident what will happen after the upgrade - Wang Yichen feels that he is eighty percent sure that after the upgrade of this Pandora's box, the probability of card conversion will change, and this change will of course change for the better.

In other words, if there are enough cards for this Pandora's box to upgrade, one day, the box will turn into a cornucopia of waste!

Sure enough, there's no garbage on the Gold Card - it's all artifacts! Those who feel that the gold card is garbage can only be that they have not discovered its true value or have not mastered the correct method.

But...... Where are so many cards to upgrade this Pandora's box? At this point, Pandora's Box shows only 1 XP, and the XP required to reach Level 2 is 100. This means that Wang Yichen needs at least 100 white cards to upgrade the box to two levels - of course, with a higher quality card, he may gain more experience. But how can Wang Yichen play so luxuriously at this time? The green card is a treasure for him.

Suddenly, Wang Yichen patted his head, quickly opened the trading market, put the green card of the arcane missile on it, and then wrote down the transaction requirements: "With Kayi Card, one green card is traded for 10 ......."

Wang Yichen hesitated for a moment, changed the number from 10 to 20, then to 15, and finally determined it to 18 before continuing: "A green card trades 18 white cards, and there is no limit to the types of white cards. Hurry up! ”

After putting the transaction information on the table, Wang Yichen waited a little nervously.

This is the second time he has traded in the trading market, and he doesn't know the market at all. The vast majority of the transaction information in the trading market is the exchange of cards of the same quality, and the exchange of cards of different quality is very rare, and most of them specify the card type. There are almost no methods like Wang Yichen.

Isn't it a bit too greedy to exchange 18 cards for one card...... Wang Yichen was a little worried.

But soon, he knew that his worries were completely unnecessary. In fact, even if the quality is the same, there is a huge gap in the value of cards according to the difference between practicality, the number of cards in circulation and the card explosion rate.

For example, some practical and rare top-level white cards can be speculated for thousands of energy coins in the trading market. And some of the worst white cards, like food cards, can be bought for a thousand energy coins from a cardseller.

And Wang Yichen's arcane missile green card itself is still worth it, in the case of no restriction on the type of white card, almost immediately someone noticed Wang Yichen's transaction information, and regarded Wang Yichen as a rookie with good luck who didn't know anything, and took a picture of Wang Yichen's green card with lightning speed, in case Wang Yichen regretted it.

"Oops, it's obviously undermarked." Seeing the speed at which the transaction was completed, and when N people texted him to ask if he still had a green card to change to a white card, Wang Yichen realized that he was too cautious.

But it doesn't matter, these white cards are just consumables anyway. And because it is a high for low, the system judges that Wang Yichen is a loss-making transaction, and most of the handling fees are borne by the buyers, and Wang Yichen only pays a little insignificant handling fee, which can be regarded as a consolation.

Picking up the 18 white cards in his hand - Wang Yichen didn't even look at what the cards were, it was estimated that they were nothing more than food cards and clothing cards and other garbage - plus the two white cards in his hand, Wang Yichen threw a total of 20 white cards into Pandora's box for conversion.

The white light flashed one after another, and Wang Yichen stared intently at the formula data of Pandora's Box. Soon, Wang Yichen got some of the information he wanted.

First of all, in the case of a white card, it can indeed change the probability of card conversion in a good direction. If the card becomes white, the probability of card conversion will not change. If a white card becomes a green card or a higher-quality card, the probability of card conversion will change in a bad direction.

Of the 20 white cards, 5 were eventually blown out, 14 of them still became white cards, and finally one was successfully converted to a green card. As a result, after blowing up 5 cards, the probability of Pandora's Box turning white to green has risen to 17%, the probability of white turning blue has risen to 6 per thousand, and the probability of bursting cards has been reduced to 18%.

However, after the white card is converted to a green card, the probability of white to green suddenly falls to 10%, the probability of white to blue falls to 4 per 1,000, and the probability of bursting the card increases to 22%.

In the end, Wang Yichen got a green card and 14 white cards at the cost of a green card, and also upgraded the experience of Pandora's Box to 21 points.

Wang Yichen, who tasted the sweetness, put the green card of the arcane staff on the table again, and the number of transactions this time directly more than doubled, and one green card traded 40 white cards, unlimited types.

This time, it was still a transaction at the speed of light, which made Wang Yichen pat his forehead and lament that he really didn't have the talent to become a profiteer, this heart was too dark......

The 40 white cards were quickly devoured by Pandora's box. This time, Wang Yichen's luck was not as good as last time, and he directly blew up 20 white cards, and the remaining 20 cards were also white cards. The only takeaway is that Pandora's Box XP has risen to 61 and the probability of card conversions has risen to an exciting level.

Wang Yichen made persistent efforts, except for the two green cards of the Holy Light Shield and the Wind Slash, which he kept for his own use, the rest of the green cards were listed on the trading market.

At the same time, he also hung a large number of white cards. As I said before, although they are all white cards, there is a big difference in value. Using Pandora's Box to turn white from white, although it does not change the quality, it can change the type of card, so many garbage white cards have become valuable cards in Wang Yichen's hands, and these valuable white cards can also be exchanged for many garbage white cards - if Pandora's Box is not limited to each card can only be converted once, then this box can now become Wang Yichen's cornucopia.

Wang Yichen quickly got busy, converting, trading, converting, and trading...... After this lasted for nearly an hour, Wang Yichen finally stopped.

At this time, the cards left in his hand eventually became three green cards, one blue card, and 10 white cards.

These 10 white cards are all converted into garbage white cards after being converted once, and they are determined to be goods that cannot be sold at all. Most of them are life cards such as food cards, clothes cards, and flower cards. This time, Wang Yichen didn't need to worry about eating and drinking for a long time, he could still wear bright clothes when he was free, and he went out to soak in a girl with flowers and gifts......

The number of green cards has not changed from before, but the types are different. The previous three green cards were of little value to Wang Yichen, but now these three green cards are exactly what he needs most