Throughout the Christmas holidays, Carl uncharacteristically didn't spend all day in the library.

Instead, they stayed in the Gryffindor common room and tinkered with something, which made George and Fred wonder for a while.

On this day, it snowed heavily outside the castle, and the snow was so heavy that it accumulated a few feet deep, and the students who stayed at the school could not go out at all, so they could only stay in the lounge and play games in twos and threes.

George and Fred are playing Gobstone with Lee Jordan, a game of stones where losers are sprayed with stinking juice.

Halfway through the game, suddenly, an angry roar came from the corner, making the hands of the three of them pause.

"Let the flames—"

The roar stopped abruptly after only half shouting.

"Day! failed!" Karl couldn't help but curse in Chinese.

"Dude, what are you doing?" asked Lee Jordan.

Karl made a bit of a fuss, and the three of them couldn't help but stop playing cards and came over.

"Make a set of toys. Karl said without looking up.

His mind was carefully recalling the steps he had just taken, trying to find the mistake in it.

"Toys?" George and Fred looked at each other.

"Carl, are you confusing the concept of toys with stationery?" said George.

"yes, Carl, are you sure you know what a 'toy' is?" Fred teased.

Karl ignored them, still thinking about what had just happened.

"Aha!" Karl thought of the key to this, and he set the trigger time of the conditional transformation technique early.

"Carl, you seem to be making a deck of cards?" said Lee Jordan seemed to find something.

The twins were suddenly interested,

"Will solitaire be more fun than crackling cards?"

Karl finally looked up at them,

"Huh. ”

......

The holidays continued, and George and Fred didn't particularly care about the card game Carl made.

In their opinion, Karl would at best copy the playing cards of the Muggle world, or strengthen them a little bit and add a few spells to them.

When they're at home, they've watched their dad fiddle with it so many times.

But when Carl gets the results......

On the last day of the Christmas break, students were heading back to school, and the Gryffindor common room was already full.

"Oh my God!oh my God!!!" George and Fred looked at the set of things in front of them like crazy.

A square table with a portrait at each end, and in one corner of the table, a waterwheel next to a delicate log cabin is slowly rotating under the current.

There are several delicate little leather bags on the game table, which are so finely made that people can't help but feel the urge to open them.

"How are they playing, Carl?" asked Lee Jordan eagerly, with a circle of people already around.

By this time, George and Fred were already the authorities in the Hogwarts game world, and the twins' reaction drew the entire Gryffindor common room to the audience.

Seeing so many people, Carl couldn't help but have a headache, he didn't want too many people to know about this game.

But now that he has taken things out, he can't take them back.

So, in full view of everyone, Carl picked up a leather bag on the table and opened the button on the leather bag.

With a "bang", the leather bag exploded, and at the same time, a golden light flashed, and five golden cards appeared in his hand.

Carl then opened five more packs in a row, each of which showed a golden card — and as the maker, he had to give himself a little extra permission.

Carl stuffed a bunch of cards into a slot on the table, and the cards tumbled in it, and finally three of them popped.

Karl grabbed them and pulled out one of them and shot it out.

The moment the card and the game table came into contact, it immediately turned into a ball of flames, causing a burst of exclamations.

But what happened next made everyone around them lose their voices.

"Let the flames purify everything!"

In a roar, a terrifying elemental creature with an orange hammer in one hand and completely made of flames appeared in everyone's eyes, almost filling half of the game table.

Ragnaros, the only orange card drawn out of Carl's five packs, didn't expect to be caught by him as soon as he came up.

So, with administrator privileges, he directly ignored the card consumption and played the card.

"Oh my God!" the twins caressed their chests, and there were many others who moved like them.

Looking at the hideous elemental creature on the table, they felt as if they were in love.

......

Over the next few days, Hearthstone became completely popular, something Carl didn't expect.

Hearthstone: Heroes of Warcraft. This is the name that Carl gave them, and it is a direct copy of the previous life.

However, compared to the game in his previous life, this set made by Carl is simple and scary, with only two hero cards and a set of neutral cards.

As for the identity of the hero and the content of the card, Karl copied it thoroughly, without any improvements, so he didn't want to waste his brain calculating how much it would cost to kill an Arvada and how much blood he could lose.

It's just that he knew that this game would be popular, but he didn't expect it to be so popular, he planned to let this set of things circulate inside, but there were too many people who saw this game that day.

So, when school started the next day, the whole school knew about it.

"Carl, you're really our buddy!"

For the past two days, George and Fred have been waking up laughing almost from their sleep.

In return for the previous Christmas gift, Carl gave them a game table and a full set of existing cards, including all the orange and purple cards.

This made them almost the most popular people in all of Hogwarts, and even the Slytherin students came to ask them to borrow them, but they all refused.

Of course, almost not exactly, because the most popular person at Hogwarts is Carl at the moment.

Everyone begged him to make a set for them, but Carl rejected them at first, thinking it was too much trouble.

"You can't turn them down forever, Carl. George and Fred said, with a bit of grumbling.

Now, neither of them dares to play this game, because as soon as they play, everyone will come and watch.

If it was in the auditorium, even Professor Flitwick would come and see it.

Professor McGonagall deducted a lot of points from them for this.

"Did you know Carl, your game is going to be a revolution!"