"First things first, don't try enchant an already forged weapon, became tall use the chances of it failing are very high." Blake nodded in approval.

"The reason is that every material possesses a certain resistance to mana and as you all know an array deals with mana. This amount of resistance a material has to mana is dependent on the nature of the material.

​​

Wood has the highest resistance because it's isn't a mana conductor, while the mythical metal called, kranus is said to be the best mana conductor. As for the rest, you can go read them up. Professor Mack didn't care about the snarls some of the students made, neither did he have any plans of punishing them.

"As for the best opportunity to engrave an array on, let's say a sword. That would be immediately the sword has been hammered to its desire and you have to make sure it is still red hot.

The reason for this is that when a metal reaches a certain temperature it loses some of the impurities that cause its resistance to mana."

At this point, everyone in the class was taking notes and had their undivided attention on Professor Mack. Not only was this a crucial point in the lesson, but for them to miss the free opportunity of having a free lecture from the greatest dimensional researcher of their time, was meant to be sentenced to death by castration before skinning them alive.

"Note, that it losing some of its impurities doesn't mean it will be easy, it just means that your chances of it being a success will increase and your chances are based on your mana control, how much you've practiced, and most importantly the materials used to compose the sword we use as an example." Professor Mack said while bringing it out a sword from his dimensional amulet.

"Now to show you all how much materials used to forgemaster an item determines if the process would turn out to be a success or a failure.

I crafted this sword for our demonstration and it was made with a searing lava crystal…" The entire class gasped in shock.

They weren't surprised that he crafted a sword, but by the fact that he had used a searing lava crystal to forgemaster the sword.

According to the information Blake had read about the searing mana crystals, they were very expensive and rare, because they could be only found at places with hellish temperatures. The problem was that those kinds of environments were extremely hard to find and if eventually found they were protected by high-level beasts.

These factors added a whole new level of difficulty to it. Some of those that were both strong and fortunate enough to get their hands on some of the searing lava crystals wouldn't even want to sell them.

"Hahaha…" Professor Mack couldn't help but chuckle when he saw the expressions on the faces of his students. "I know what's on every one of your minds, but it isn't so… After seeing how poorly you guys performed in the survival exercise the school decided not to spare any expenses in training, you guys." He explained the situation.

'Hehe, and I was a genius who capitalized on the situation and requested more materials to further my research, with the excuse that it will go a long way in helping the students.' Professor Mack wore a mind shade with a smirk on his face as he thought to himself.

"Now as you all know, the reason why the searing lava crystal is expensive and highly sort for by forgemasters is because of its property that helps the item attain very high temperature from little heat, also it helps removes more than twice the impurities that normal heating process will eradicate, thereby increasing the effects of the array engraved on the weapon.

They are mostly used in forging fire-based items, to increase their quality by a whole lot. Now watch closely…"

The professor began inscribing the mana gathering array unto the sword and the entire class watched closely without making a single sound.

Professor Mack tried to be as slow as possible so that the students could follow up, but still, his speed was astonishing.

"Now for a sword forged without a searing lava crystal…" He brought out a normal sword this time and repeated the process.

'The resistance was higher than the first sword and so was the mana.' Blake thought as he observed the process.

"Any questions?" Professor Mack asked as he ended the process.

After a few questions from some of the students, Professor Mack took Blake to his office through a warp gate.

…

"I will have to say a big thank you for suggestions because they helped me a breakthrough in the barrier I have been facing in my research." Professor Mack said with a bow, showing his gratitude.

"Professor Mack you don't have to thank me, all I made was a suggestion I am pretty sure that you would have found it out on your own," Blake said with a modest smile. He was very happy that his idea had helped professor Mack in his research.

"Maybe, maybe not… I might have but the underlining factor there is time and in the world of researchers, time isn't always on our side.

Without your idea, I might have died in one of my experiments before I could have discovered anything. That is why I am thankful and to show my appreciation I have prepared gifts for you." The professor said while bringing out 2 brown covered notebooks and handed them to Blake.

"The schools might have given you some measly points, but I say that isn't enough.

The first book is on how the principles of the blink spell and how it works, while the second is the advanced version of blink or you can call it to point blink." Professor Mack said with a smirk.

(AN: As I said, I am horrible at naming things , so if you have a better name please leave your suggestions in the comment section. Oh… you have to know how it works before naming.)

"This… isn't this too much for a single idea?" Blake was utterly shocked by the gifts. In no way did he expect that the gifts he was talking about were the theories and spells of both his idea and that of professor Mack.

"There is no time to be modest, remember I still have to get some rest." Professor Mack said with a yawn, before bringing out 5 throwing knives.

The knives had the designs of a kunai he usually saw in anime series, but there was a little orb at the end of kunai instead of a hole.

"I modified the Blink spell and instead of placing marks as beacons for the spell, I decided to make the beacons in the form of knives and I call them void daggers."

The void daggers acted as a beacon for blink, so all Blake needed to do was to throw it at a certain point before casting the spell. If there were multiple daggers, all he needed to do was direct his will to the void dagger he wanted to appear at.

"For the point blink that isn't at your level for now so I would explain the theory." The professor said as he began removing his shirt.

'What the…?!' Blake was immediately on his guard when he saw him undressing.

"Calm down…" Mack said when he noticed Blake's expression. A second later after pulling off his shirt his quite pale skin was full of many symbols that were like tattoos.

"Are those arrays?!"Blake blurted out in shock when he sensed the mana being emitted by the tattoos.

[Oh my!] The system was rendered speechless. Unlike Blake who didn't know the arrays he saw, the system knew everything single thing about all of them.

[He is a walking array… literally!]

"Yes, they are arrays and one of them is concealment array that prevents people from seeing and sensing their presence unless I want them to see it.

Back to the topic…"

Professor Mack quickly explained how the point blink worked and the reasons for the arrays on his body.

Just like Blake had suggested, the point blink was a large array, but unlike others that needed to be stationary this was movable and Professor Mack was the node.

For the point blink spell to be cast the array must be activated and when it was activated a holographic image that was 30 meters wide and invisible to the eye will appear and at the center would be the caster.

The array allowed the user to blink anywhere within the array and it was continuous and had no cooldown, but it cost a lot of mana to cast one blink, but according to both the system and professor Mack, it was worth it.

….

While Professor Mack was teaching Blake the spells, something was happening in a faraway location.