It took me nearly five and half hours to break the formation; I would have finished a little sooner if I am not busy with little something. Now that I am ready, it is time to opened the door.

Zip!

I did waste any time projected the formation on the door. "Hehe, Human, if you think you could open the door that I could not afte" It laughed and mocked me when suddenly it stopped when runes lighted up and the door opened, and I moved swiftly inside.

The Blood Rhinoman had remained stumped for a fraction of a second before it entered behind me.

Bang!

Not only that, but it had also attacked back the other Elite Grimm Monster who was trying to enter behind it. The other Grimm Monster cursed at it and tried to enter again, but by the time it could take a step inside, the door had already been closed.

I was a little stumped seeing something like it happened; it had been quite a while since I had seen the tribal rivalry among the Grimm Monsters.

There are huge tribal rivalries that exist among the Grimm Monsters. It is especially intense among the low-level warriors, but as they reach higher in power, they cooled it down and work together, setting aside their differences, but sometimes it comes out, like now.

"Ha, I did not think that puny human like you could solve such extremely hard formation; it looks like I had come across the gem." It said as it looked like at me with bloodthirsty eyes. The bloodthirstiness of Blood Rhinomen is quite renowned.

"Snort! Do you think you could beat me? We are of the same level." I replied, going defensive in my speech. "Hehe, we might be of the same level, but there is a vast difference between us; it won't take me more than five minutes to chomp you down under my teeth," It said while licking its lips on its teeth.

"Oh, I would like you to try," I said while summoning my sword in my hands. "As you wish human after I am done feasting on you, I would enjoy the gift you have given me." It said while motioning toward the office.

This time, I did not reply and watched the Blood Rhinoman as bloody aura blasted off it, and it readied itself to swung its blood-colored sword at me when suddenly its expressions changed, and a look of horror appeared on its face.

"Human, what did you do to me?" I asked. Aside from its neck, all of its body had been frozen; it could not move even an inch.

When I was solving the formation on the gate, I am also using my vines to trap it, and by the time I was finished breaking the formation, my vines had covered it by 95%. 

If I did not have any plan in my mind, I would not have let it inside the office; even if I did not match it in raw strength, I am still strong enough to stop it from coming inside.

Puch Puch Puch

"I hope you will enjoy the hell," I said, encased it completely before piercing thousands of sharp ends of my vines inside it. 

The bastard has quite a tough defense. If not for the recent boost, I would have had to use the power of my totem artifacts enchantment to make my vine ends sharp enough that they would be able to pierce through this Blood Rhinomans body.

As my strings went inside it, they started to grow and spread. They also faced resistance there, but it is nothing compared to what they faced when they went inside the monster with a powerful bloodline; the resistance of bloodline is much more powerful than that of the inheritance.

While the Blood Rhinomans inheritance is powerful, it is still not powerful enough to stop my vines from growing.

It took twelve minutes for them to spread inside the Blood Rhinoman before I started the harvest process. I really liked when Green and Silver runes harvest; they make the process very fast. It took them less than five minutes to harness the bloodline and essence while I need four times more than that, especially when it comes to powerful Grimm Monster like Blood Rhinoman.

Around fifteen minutes later, it had turned to the husk, and I took out the essence that rose from its body. 

Such mighty Grimm Monster fell just like that.

If I had fought against it fairly, without using my vines, I would have had no chance of winning, but who fight fair, even Grimm Monsters use every advantage they have.

I took its things from its husks, especially the storage, which is filled with things like precious herbs. It had the greatest amount of herbs I had seen any Grimm Monsters have, but the thing that made me happy is not herbs but the advanced calibrator, which will make things even easier for me. 

I admired my new toy for a few seconds before I looked around the small hall I am, and a smile on my face had become even bigger and brighter.

This office is full, not only with furniture but also with the bookshelf. There are barely any things taken from it, even bookshelves are only 10% empty, the former residence of this office only took important things with while leaving everything else.

I looked around for few minutes before I started collecting things. First, I started with the things which are not protected by formations; it took me few minutes to collect them all before I took out my shiny new toy and started breaking the formations.

The new calibrater is better than I had imagined; it had increased my speed of breaking formations by 25%, which is huge, not to forget various formations it had stored inside it; they are more advanced than those in my previous calibrator.

This new calibrator is too good, and I had found its perfect time. The formations in the floors above would not be easy; my new calibrator would help me a lot in solving them.