After groping around with the kobold leader's corpse, a large number of hints immediately appeared:

[NEWS] You have obtained the [Ebony Staff]!

[News] You have obtained the [Frost Skill Book]!

【NEWS】You have obtained the [Lair Chest Key]!

【News】You have obtained [Fine Fiber Shoes]!

[News] You have obtained the [Beast Tooth Necklace]!

[News] You have obtained [Red Herb]!

It seems that except for the [Frost Skill Book] and the [Lair Chest Key], they are all useless things.

The ebony staff adds a little intelligence, and the rest has no other attributes! The defense of the fine fiber shoes is not as good as the leather shoes, and the beast tooth necklace adds 2 attacks, and it is better to bring a bronze necklace of your own making. As for the red herbs, they are easy to collect!

After using the [Frost Skill Book], learn the water magic skill Frost, which releases a very low temperature frost breath, causing the enemy to fall into a state of frostbite.

Tina can learn one more magic!

Jia Zhengjin was very happy, and after putting away the skill book, he immediately took the key to open the treasure chest.

【NEWS】You have opened the kobold lair treasure chest!

[News] You have obtained the [Kobold Lair Building Blueprint]!

[NEWS] You have obtained the [Arrow Tower Construction Blueprint]!

[NEWS] You have obtained the [Battering Ram Construction Blueprint]!

【NEWS】You have obtained the [Watchtower Construction Blueprint]!

【News】You have obtained the [Malt Bread Cooking Recipe]!

【NEWS】You have obtained 50 iron ingots!

The construction drawings of kobolds' dens and arrow towers have long been learned, so they are basically useless. Instead, the battering ram, watchtower, and malt bread recipes are three recipes, and 50 iron ingots are a good bonus!

Jia Zhengjin came out of the nest and looked up at the sky. The blue sun has begun to set over the western horizon, and we must hurry back to the city!

Hop on the head of a shapeshifter and return loaded with loot.

When he returned to the city, he found that everyone was still busy, and he didn't notice his departure during this time.

"Tina!" Jia Zhengjin went directly to his wife.

"Wait a little longer," Tina said in the kitchen making gold and silver cakes with her parents, as well as Perrin and Christina, and immediately responded when she heard the voice, "I'll be ready in a minute!"

Jia Zhengjin had to wait a moment until Tina finished the gold and silver cake in her hand and handed it to her father-in-law, Brilliant to bake.

"Is the stage ready?" Keane!" Tina asked, as soon as she came out.

Seeing that his wife's face and hands were full of glittering powder, Jia Zhengjin couldn't help but smile and reached out to touch it, and then spread it on her more evenly.

"Oops! what are you doing?" said Tina, pushing his hand away in a coquettish tone.

"It's so much prettier!" Jia Zhengjin couldn't help laughing at Tina, whose whole face was shining with gold.

"Isn't it pretty?" Tina suddenly reached out and touched him the face, "Then you can do a little too!"

"Oh yes, you've learned how to sneak up on me, watch me paint you a beautiful makeup!"

"Don't~~"

The husband and wife played happily for a while, and Jia Zhengjin was also smeared with gold dust on his face, and then he remembered the matter: "Tina, you stand still first!"

"Oh!" Tina immediately stood up obediently and looked up at him.

Jia Zhengjin used the skill book on Tina, and soon got a system prompt that she had mastered a new magic skill [Frost].

"Keane, is this new magic?" Tina was surprised, but at the same time delighted.

"Hmm, try it!" Jia Zhengjin pointed to an open space at the door, where there was still water left over from cleaning the grinding disc.

"Good!" Tina immediately took off the ebony staff she was carrying and muttered silently, "Harumitu!"

"Whew——!!" Her right hand immediately erupted a stream of cold gas doped with hoarfrost.

The air around him dropped a few degrees in an instant, but the water on the ground was not frozen, but covered with a layer of snow-white frost.

"It doesn't seem to be very powerful!" Jia Zhengjin was a little disappointed, he thought that at least he could freeze the water into ice!

"Keane, this magic is good!" said Tina, happily, "If you use it well, it can have a great effect!"

"Really, that's good!" Seeing his wife's happy appearance, Jia Zhengjin felt comfortable, "Tina, I will get more magic skill books in the future." At that time, it is possible to have intermediate magic and advanced magic. I'm going to slowly turn you into a super powerful magician!"

"Thank you, Keane!" Tina hugged him tightly with open arms.

"Okay!" Jia Zhengjin lowered his head and pecked her mouth, "You continue to be busy, I want to make good things to use at night first!"

"What's that good?" asked Tina, curious.

"You'll find out at night!"

Jia Zhengjin first went to the warehouse, took out a large amount of coal, and then went directly to the factory.

Immediately after entering the factory, go to a tool table, select gunpowder from the crafting list, and click Craft All.

It took him a long time to get three hundred gunpowders, and by the time they were all finished, the sun had already set outside.

Before it was dark, he immediately came out with gunpowder and went to the kobold's lair to recruit ten kobold miners, and then each kobold issued a normal quality iron axe, and took them to the outside of the city to cut down a large number of empty trees.

The empty trees are then transported to the factory and processed into short wooden tubes.

The empty tree is as hollow as bamboo, but it lacks a middle compartment than bamboo. Therefore, it is necessary to block one side with plant fibers and add clay to ensure that no air leaks out. It is then filled with gunpowder from the other end and stuffed with improvised fuses made of plant fibers.

After making the first test piece, Jia Zhengjin immediately called a kobold miner and asked him to hold a torch.

He placed the first firework in the emptiest part of the factory, then quickly moved away, and ordered the kobold miners to light it.

The kobold miner received the order and without hesitation walked over to the rudimentary handmade fireworks, aiming the torches at the lead.

As soon as the fuse ignites, the spark travels along it into the interior.

Jia Zhengjin stared nervously, not daring to blink his eyes.

When the spark burned inside and finally touched the gunpowder, there was finally a reaction.

"Boom!!" A violent explosion occurred, and the kobold miner standing next to the fireworks was knocked to the ground by the powerful explosion, and lost his breath in an instant. And at the location of the explosion, the ground was as black as if it had been burned by fire!

"Wow~~" Jia Zhengjin was glad that he didn't go over to light it himself, but he didn't expect that the first one made was not a firework at all, but a powerful bomb, "Successfully made a grenade! Long live~~ It's weird! I want to make fireworks......"