Leo stared at the door. As far as he remembered, the door opened to a hallway that lead to the main hall. That was probably where the bulk of the members were. He opened the door and saw that it was just as he expected it to be.

He saw a long hallway that lead to a closed door. He knew that the main hall was behind it because there was a lot of noise coming from there. He looked around and saw that there were two staircases leading to the first floor.

He went up one of them instead of going to the hallway. His plan was to first take care of any members that weren't in the hall to dwindle down the numbers. If he was careful, he would be able to do it without alerting anyone. Then, he would have an easier time dealing with the rest.

He quickly found his first target. It was a drunk man coming out of one of the rooms.  He wasn't surprised to see Leo because he just assumed that it was another member of the Blacktooth Gang. Leo could sense that the man was a 1st Circle Aura Knight, so he had his defenses up. He was ready to kill him before he made any noise.

"Wear your uniform. Otherwise, the superiors will reprimand you." He scolded Leo.

Leo looked at his outfit. He was currently wearing a mask and a cloak. Why did this person think that he was a member?

"Also, do you want a go at the girl I kept in there? You are going to have to wait your turn. I promised someone else the chance after me." He added. Leo clicked his tongue.

He threw a magic bullet at the man's head, immediately killing him. Even though he was a proper 1st Circle Aura Knight, the man was so drunk that he wouldn't be able to guard it anyway.

"Trash," he whispered. He immediately grabbed the man's body and dragged it into the room he came out of. Inside the room was a girl who was so intoxicated that she didn't even notice the new person who came. She was completely still on the bed.

He hid the man under the bed after taking his pouch and throwing it in the bag. Once he did this, he went outside to search for his next target. He was able to scan the region close to him and was able to know where everyone near him was and even how strong they were. This was because of the breakthrough he had.

He found someone walking to the corner and was going to discover him. Leo immediately Shadow Stepped behind him just as he turned the corner. Leo pointed his hand at the unexpecting person. He hadn't even realized that someone was behind him. A magic bullet flew into his head, killing him. Leo dragged him to a nearby room where there weren't any people. After looting him as well, he went to find the next target.

The bulk of his time was spent dragging them to a room and hiding their bodies. After spending half an hour killing 10 people, he realized that it was inefficient. He knew there were around 150 people in the Gang. He had already taken out 10, so that left 140 people to kill.

He could assume that there were 100 people in the hall since he could detect around 30-40 people on the first and second floors. So he decided to take a more aggressive resort. He was going to go on a killing spree fast enough that no one would notice that something was wrong.I think you should take a look at

He saw a few people in the hallway near the room he was in. He immediately left the room and went toward them. When they saw him, they were mildly surprised to see someone who didn't belong there.

"Who are you?" One of them asked.

As he asked the question, the other two people there slumped to the floor. Leo was not taking any chances. He was trying to get it done as quickly as possible. He fired another bullet at the person who was too drunk to realize what was happening to him.

Leo just picked up their pouches but left their bodies in the hallway. He sensed a few people coming to the area he was in so he decided to just intercept them beforehand. Why wait? This time, it was a group of 6 people. All of them were 1st Circle Aura Knights, but since they were drunk, they weren't as effective.

Also, compared to Leo who was a 2nd Star Mage, they were basically cattle fodder. When he saw them arrive, he threw a flame burst at them. Flames engulfed the entire bunch and exploded. The flames themselves made a small explosion sound while the victims screamed a little before dying. All of this created a substantial amount of noise. 

It was a lot of noise, but it wasn't enough to be heard on the ground floor where they were all partying. However, a lot of the people on the first and second floors heard it and started to move toward the area where the screams were coming from.

Leo was ready for this. He knew that he was going to make this much noise when he switched to Flame Burst over the Magic Bullet. However, the Flame Burst would make it easier to deal with larger groups. It also played a part in the bigger plan that he had.

He sensed the first group of people coming toward the sound. They were around 7 members coming in a group. They were unaware of what the loud sound was, so they weren't as wary as they should be. When they crossed the corner, Leo was waiting for them.

He threw a Flame Burst at the entire group. One of the members was less drunk than the others, and so he cast a shield around himself. It defended him from the explosion, but the fire was still incredibly hot for him. Leo saw that he was more perceptive and threw another Flame Burst at him, creating another explosion. This took care of him completely.

The sound alerted everyone on the first and second floors, making them come toward it. Leo knew this, but he also knew there was still some time before they arrived. He took this time to see if the money pouches of any of the people survived. To his surprise, all of them did. The pouches were actually fireproof. Since they were all issued by the Blacktooth Gang, they were all the same pouches.

Leo readied himself for the next wave of enemies. This time, it was the rest of the people that weren't in the main hall. He had already taken out 23 members till now. Almost 30 people were approaching him from both directions in the hallway he was in. The charred bodies remained in the hall, giving out a bad smell. The flames from the Flame Burst were still lingering, refusing to die out. 

Leo threw a Flame Burst at one of the ends of the hallway. It was seemingly empty and there was no one in sight. Just as it landed, the first group of members arrived. They were greeted by a massive explosion.