Seeing the dead tiger that they definitely would've struggled with, the group was shocked at how fast Fenrir dealt with it.

Getting rid of the chains that were on the tiger, Fenrir began munching on the tiger like someone eating an oversized chicken.

"W-wah. Awesome," one of the girls exclaimed.

"Fenrir, can you please teach me how to be as strong as you?" Grisha asked.

Fenrir turned towards Grisha, still munching on the cooked tiger's meat as he spat out a large bone. "Fire. Fire is very cool and strong."

"I see. Like this?" Grisha channeled his mana and created a fireball in his hands.

Fenrir shook his head. "No, make stronger fire."

Tai looked at the dead tiger and told the group to keep going as they couldn't slow down. "Come on. Let's keep going."

As they were walking and trying to find the portal, Fenrir had been trying his best to teach Grisha. Although it was hard since he wasn't the best teacher, Fenrir managed to teach Grisha quite a bit, improving his Fire Magic since Grisha didn't have access to Fire Manipulation.

Of course, it wasn't all peaceful in the dungeon. Monsters would appear and usually, Fenrir would deal with them or some individuals in the group like Grisha to test out what Fenrir taught him.

Eventually, as they walked through the dungeon, they found the portal and that was how most of the day passed by. They found portal after portal, going up the dungeon levels at a steady rate.

To make sure that the party members weren't weak, Tai would let them fight once in a while when he found a good opponent for them, coaching them on what they should and should not do.

During their time in the dungeon, they gathered a lot of loot to which Tai would store them in his storage to sell later. He wasn't selfish so he wasn't planning to take any of the group's money and just distribute it to everyone equally.

They also took breaks here and there since fighting some of the monsters exhausted them. 

Tai also managed to test out his new body that was comprised of darkness in the dungeon. In one encounter, a snake tried attacking him, but its attack just went through his body like it wasn't even there.

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He could also 'merge' with the nearby shadows, becoming nearly indistinguishable with the only way of detecting him was to detect the aura from which he naturally radiated. Tai could conceal his aura a bit, but not being his specialty, he wasn't the best at it.

He did theorize that if an assassin who specialized in concealment had a body of darkness, they could be in the same room as their opponent and they wouldn't know a thing.

"This is insane. We reached level 40 and we're not that far from level 50. Your brother is insane, Anna," Joan said.

Anna nodded. "Yup, I wouldn't be surprised if we actually reach level 50 today."

"Come on everybody. Break's done," Tai announced, clapping his hands.

Once everyone was ready, they set off once again. They passed through level after level and by the end of the day, they finally reached level 50.

"Finally! Ahhhh, we can rest now!" Leroy exclaimed. He was strong, but it wasn't easy acting as the tank of the group and receiving attacks that certainly could've killed him if he wasn't focused.

"You can take your rest. You earned it," Tai said. He had been pushing them, making their teamwork better, and increasing their own levels.

The group took a short rest before heading to the exit of the dungeon to end the day. It had been a long day and everyone was happy to leave the dungeon.

Exiting the dungeon and heading back to the city, everyone was smiling and talking, asking about what they were going to eat for dinner. 

As they were walking back to the city, Tai felt an unknown presence behind him. Someone was definitely watching them. He turned around to look for the person, but found that there was no one following behind them, so he opted for a different tactic.

Tai used his darkness to find the person and found that they were invisible, following them from about 10 meters away. "You guys go on ahead. I've got to take care of something."

"Are you sure? We can wait for you," Anna said.

"I can help you, master," Fenrir said, oblivious to the person that was following them. "What do you need help with?"

"Nah, don't worry about it. Go ahead, you too, Fenrir. Aren't you hungry, go eat something," Tai replied.

"If you say so."

The group went on ahead, entering the city and disappearing.

Finally, he could confront the stalker. From what his darkness gathered, whoever was following him was human, or at least humanoid.

He used this by using a new type of darkness that he learned during his time in the dungeon, Esoteric Darkness. This type of darkness was special in the way that unlike normal darkness, the user could use it for magical effects like for example, darkness that can heal, or darkness that can't be extinguished by light.

Disappearing from where he was standing, Tai appeared in front of the stalker, grabbing it by the neck and lifting it up in the air. "Who are you? We're not in the Aether City. Talk or else..."

The stalker's invisibility disappeared and it revealed a blonde teen with long, pointed ears. "Hey, is that what you do when you meet an old friend?"

The stalker smiled, seemingly unaffected by Tai holding him up in the air by his neck.