How to repurpose evil:

It was at this point that the Goblins realised that if there was anyone who could repair Wizard-Goblin relationships, it might be just these two people indeed. By Gobblydook's tongue, what was in this food? This item had vegetables and meat, and it was perfectly balanced. The dressings made it pleasant to eat. Harry paid no mind to the sombre reactions of the Goblins and began to speak:

"Yes, my gentle goblins where do we start? I was researching how wands work and I believe I discovered something that even Olliviander probably does not know. But in any case, Invictus was the person who taught his ancestor, so we the Peverells are supposed to be the authorities on wand lore. Anyway, I figured out the key mechanics of how wands shape magic.

My mother – biological that is, Lilly Potter postulated in her research that a wand's ability to produce evidence of its last known spell was proof that the wand contained memory storage. If it could be made to remember a spell on demand, then a spell could be reproduced on demand. I used my Mage sight and a muggle microscope to examine a lot of the structures closely. The microscope is a muggle device that allows you to see extremely tiny structures. The suspicion was confirmed.

I discovered that your intent transfigures a wand core into the needed structure to produce a particular type of spell. The energy to sustain the spell comes from the body. I decided to separate these elements into an 'emitter' and a 'magical power source' which you are already familiar with - now we can store a spell and reproduce it later."

"Without runes?" asked Bloodaxe.

"Exactly that. With this innovation, we began to explore if standard combat or defensive spells could be utilised in alternate ways for armour or weapons. Other innovations came about. Right now, we are using a defensive Protego spell as repurposed furniture. We also are using the modified Protego shield spell to contain the air. Yes, physical objects can pass across. Hermione is the inventor."

"That is impressive. What about the light?" asked Bloodaxe.

"The lamp is a gas called Xenon, that is contained inside an enclosed Protego field. The other assembly fires a Lumos into the space and energises the gas which would normally glow quite brilliantly with muggle electricity. With the magic, the effect is amplified. As you can imagine, this is miles ahead of any other light source in the wizarding world" Hermione explained.

"I can see many applications can arise from these discoveries. Perhaps the Medi-Bracelet is coming soon?" questioned Bloodaxe.

"Certainly, after I get my Godfather out. I have a lot more stuff on the way. Armour, a prototype broom and many other things. Today's venture is to take Fiendfyre and utilize it in two things – a torch and a rifle. The torch can be used for welding metal or cutting objects. The gun is to screw over Dementors. So how are we doing this?

Plasma is a type of gas that is electrically charged. Just as you have solid, liquid and steam-like as what the wizards call 'states of being', Plasma and Bose-Einstein condensate are two other 'states of being' that the Muggles discovered. Plasma is not special, rather it is what you find in the sun. It is one of the hottest things in the universe and its ability to destroy or build things is unparalleled. This is why it is dangerous. I am going to attempt to cast it, with the understanding of what it is, and then I will only use very little energy to see what happens."

Grandfather you there?" Harry questioned.

"Loud and clear grandson. I understand Fiendfyre is a spell that you need to feel hatred to conjure, or so the legend goes. I think heavy emotions amplify the magic produced. Perhaps this is needed because the spell requires a lot of energy." Invictus commented.

"I am thinking I can reduce the spell cost by using my intent. I am going to let my thoughts linger on how hydrogen becomes plasma. I am only thinking about a little flame. Let me put some distance between me and them." Harry responded.

Hermione naturally followed and stood not too far from Harry. She was prepared with her wand to disarm Harry if necessary. Harry trickled the most minimal amount of energy and softly said "Fiendfyre"

A short orange crack could be heard from the wand as a temporary flame fizzled out. Harry put in a little more energy.

It still fizzled out.

Harry for the next hour would cast the spell at least three hundred times slowly raising the energy. The flames were getting bigger, but they never sustained more than a second. Harry would check the entire affair over with his mage sight.

On his 301st try, the magic sustained a small controllable flame that was finger sized. Suddenly it started to grow. Harry could see the energy from the wand was slowly travelling out and energising the adjacent particles in the air and he immediately cut the magic. The flame continued to propagate for at least 10 seconds, before fizzling out.

He looked at Hermione and said,

"Well, the magical energy to start the flame is about five 'lumoses' worth of energy? I cut the energy immediately because it was on the verge of a chain reaction. Suggestions?"

"You know that fantastic roast chicken we are getting today – the oven has a pilot light. My dad will often check it, before lighting the main burners for the oven. Maybe you need to start with a large amount of energy and as soon as you have ignition just feed it a trickle of energy. Remember people usually animate the Fiendfyre. You just need to imagine it as a flame from a welding torch." Hermione replied.

Harry nodded.

He gathered his energy and thought about how he would deliver the energy. He had never done a spell with a variable energy flow. He tried again.

"Fiendfyre"

The flame held a slow constant burn before it popped out of existence. Five seconds. Not bad at all. He tried again. Still no progress.

Harry could feel that his ability to trickle energy was unstable. Flowing big amounts was easy but fine control was problematic. Harry walked back to the containment field and gingerly stepped across the modified Protego spell. He sat down and had another wrap. He was sweating bullets.

"Not so successful?" Bloodaxe questioned.

"Some success. I did manage to conjure it with control for a bit. I can't keep a teeny flow of magic consistent. That is rather difficult. But I think I have a workaround" Harry replied.

"What do you plan to do?" Bloodaxe asked.

"Our wands have some energy stored in them. I also have some unique ways of getting Magical energy to flow from the ground into my wand assemblies. We will try again with some tweaking."

After connecting the wand to the ground plate to establish the magical circuit, Harry thought about the spell being sustained only by the passive energy in the area, and he cast the spell again.

"Fiendfyre"

The flame continued to glow brighter and brighter. Harry was about to disconnect the antenna coils but then the flame stabilised and seemed happy. Harry continued to observe the spell and he noticed that there did not seem to be any chain reactions. He then terminated the spell with Finite.

"Alright Hermione, so for the torch mode, I have gotten the thing to run as a continuous spell. We can cancel the spell with a Finite or we can cut the power. Time to put this into the metal tool."

On cue, Hermione began to connect the gas bottle to the custom tool that Harry had manufactured at the machine shop. He had already inserted a core and prepared the tool beforehand. The only alteration was grounding connections, but Harry had always made it a habit to leave extra screw holes in his designs for emergencies. After installing the antenna circuit, he programmed the intent modified spell pattern.

Harry then started the 'welding torch' and the heat given off was hot enough to make the air around the object feel warm. Harry motioned for Hermione to bring the welding gloves and the steel coupons. Invictus realising what Harry had done said quite proudly

"Well done grandchildren, I see you guys used your brain to get around the problem. Good idea, running it off the ground circuit. The shielding gas is excellent. Now to test it?"

Invictus looked on anxiously as Harry placed two of the metal coupons on the ground. After applying the torch, within five seconds they were red hot. Hermione who had noticed skipped across to the containment area and brought some tig filler wire. He began to melt the wire in the hot puddle.

Harry had little experience, but it seemed to do fine. Bloodaxe looked on and realised that not even Goblins had a device that could do those types of temperatures that easily or quickly. Then Harry cut the argon flow and switched on a secondary magical circuit that used a 'pipe compressor' to blow large volumes of air. Harry adjusted the valve and he was now cutting the metal not too differently from a plasma torch.

"Well, Bloodaxe let us see what the torch can do" Harry commented as Bloodaxe came closer.

Harry walked towards some rocks on a nearby wall of rock and proceeded to gently heat the rock. After the rocks were hot enough, Harry took a couple of steps backwards and conjured an aguamenti charm against the rocks. The rocks began to flake out and soon enough diamonds could be seen. Also, small pebble-sized amounts of gold felt out as the clay and stone. Bloodaxe smiled. Hermione was amazed but confused. Harry then proceeded to explain.

"Well Hermione, this is called Fire-Setting. You heat the rock and cool it off with water. Used in prehistoric times. Just a quick test really." replied Harry.

"This tool, we could these. Could you take a rush job? Even for the light too?" asked Bloodaxe.

"Sure, easy to manufacture. Let me take a break. The focus required for intent-based casting makes my head hurts a bit."

Harry was now sitting within the containment area and was eating some finger food. He looked at the light source and commented:

"Let the light stay up there. I want to torture test it. I think every three days someone can go and just drip magic into the big red bit. That is the power cell. It's the only red object on the entire thing, can't miss it. No guarantees it won't fail in the long run as it is untested, you are using it at your own risk. Don't apply any other charms and magic to it. I don't want explosions."

"Noted. We would be quite happy to replace these regularly even if they wore out quickly. Cave excavation is a dangerous business, we often lose people. We have one of our metalsmiths on the way to look at the torch. She is bringing some test pieces. I think she will be quite excited.

I am also pleased that you will meet my only daughter. Goblin children are rare enough for us." Bloodaxe replied.

"It would be my pleasure, for both of us. Suggested protocol for greeting her?" Harry questioned.

"With our women, the greeting is based on having a prosperous household and enjoying much profit. I am anxious to see what you come up with. Mistress is the title for a female goblin. She might be here in the next hour, you have time. She is coming from another mine that is quite a distance from us." replied Bloodaxe.

"Well, time to see how the gun works out. Grandfather, what did you say? Dragons and Serpents are typical creatures for Fiendfyre?" Harry asked.

"Yes. Naturally, this is difficult to maintain. It takes a lot of control. You can continue to control the construct after you summon it. What do you plan to do?" Invictus asked.

"I plan to do the exact opposite. I am going to strip it down to a continuous beam. I am going to use my intention to shape the effective range as 50 meters. After that, we fizz out as I don't want any chain reactions."

"Not assault rifle range, but submachine gun range," Hermione commented.

"Correct Mione" Harry commented.

Harry grasped his wand and walked off to his previous spot. He decided to try a new technique. Perhaps if magic needed mental constructions, he would provide one. He slowly fell into a partial occlumentic trance as he focused internally. He imagined his core as a big cup of water.

He imagined a dropper squeezing only a drop of water- a single drop that would splatter on the ground. He imagined the drop slowly travelling towards its target. He also imagined that the drop would transfer its heat. As he meditated on the intention, he slowly raised his wand and became aware of his sight. He gently with respect for the Magic, cast the intent modified spell.

"Fiendfyre!"

The spell materialised and then proceeded to fragment like a shotgun blast and completely faded out within about 20 meters. He tried for the next half hour trying different amounts of power from different power cells. The spell became unstable and he backed off. Harry then walked back to the containment field.

"Hermione, time to bounce ideas. Only getting a shotgun blast. Not necessarily unwelcome, very cool and very useful. But, I was hoping for something long range." Harry complained.

Bloodaxe watched on quietly, observing how they went about problem solving.

"Right. Describe what you thought about?" Hermione asked. Harry accurately described exactly the mental construction he had used.

"See the funny bit, is that you thought about the wrong thing. You thought about splattering drops, what did you expect? Go and try a long uninterrupted stream of water. I am suggesting needle thin, and probably make the plasma splash in a small puddle when it hits the target. Use the other constructions about how the energy should travel and whatnot. Aim for 400 meters. That is acceptable rifle range."

"So, one Volkite assault rifle coming right up?" Harry asked excitedly.

"Dammit Harry this Fiendfyre. Can you not think about Warhammer 40K and 'For the Emperor' memes right now?" Hermione chastised, in a concerned voice. It was too late.

Harry was already yelling "For the Emperor, Kill the Xenos, Purge the Unclean, Burn in Holy Fire!" as he skipped back with another spare emitter core. He cancelled the previous Protean charm and began to shape the intent of the spell again. Twenty five minutes later, he was confident enough and he gradually opened his eyes as he cast the spell. He whispered with an absolute pinnacle of focus

"Continebat Trabem Fiendfyre"

Harry had hoped the occasional Latin he had been learning would help him to tame the spell. He was not even sure if that expression made any sense, but it helped him to conceptualise the idea. After all, 'Stupefy' and many other standard spells had no Linguistic origin. He was pleasantly surprised to see the red-orange beam travel quite a distance before it seemed to fizzle out into a smoky mass of reddish hazed incoherence. The air seemed to swirl from the immense heat. Harry was only trickling the most minimal amount of energy. He switched to his mage sight and the magic seemed to be stable, contained and was far from cascading into a chain reaction.

He then decided to have some fun. He began to look at the roof and began to scan for the most precious jewels. He began to selectively target places where the heat would cause the rocks to crack. In no time the rocks fell with a resounding crash. Against the pale blue light, he could see many Rubies and Sapphires as they dislodged from the debris. He also found this perplexing, generally, as those gems should not occur together. Harry surmised that Magic was involved.

He could tell that Bloodaxe had appeared somewhat behind him and had been observing clearly. Soon enough within thirty minutes, Harry had at least cracked and dropped at least ten small piles of rock which had been laden with an assortment of jewels and small bits of gold. Or at least, that is what his Mage sight had shown him. He terminated the energy flow of the spell from the emitter core.

"Well Bloodaxe, I thought I would test the stability of the beam and put some of it to work. I hope I managed to score something useful for the folks at Gringotts. I wasn't sure where else I could torture test the spell. How did I do? I should have asked first, my apologies. I was quite…er…..excited." Harry said ashamedly, scratching his head in embarrassment.

Bloodaxe snorted so loudly it almost sounded like throat cancer. He then said.

"You, in the space of half-day with the assistance of Hermione Granger invented two entirely new tools before my old eyeballs and proceed to do a rather large excavation that would have taken at least a month, with probably one of two deaths involved. No, my King is going to be pleased and I have many winning bets to collect" he laughed loudly.

Bloodaxe continued to explain as Harry was perplexed about how the excavation occurred:

"The Goblin tradition is that when the excavation is made, the lead goblin gets twenty per cent of the dig if he survives as compensation for the risk to his life. Under Goblin law, every other breathing body in this cavern is entitled to a five per cent assistance payout. Because you chose such a rich deposit, it happens that will cash out to be a lot.

Gringotts is aware that the only place to bank all money earned by our own Goblins is in our vaults. Gringotts will also get the rest. For this dig, 45% of this is no joking matter." Bloodaxe mentioned.

"Griphook, this is the opportunity you have been waiting for – you will have enough for your family matters and to pay for your exam as a client broker. You can intern under me. I think the main Peverell Account is going to become so demanding, that you can handle the auxiliary accounts. You will handle the Granger, Singh and Findley Accounts should you succeed in your exams. We will both use the Potter investments as a case study for good investment practices. You will work as my aide.

I know Silverdagger screwed you over, he is a treacherous kobold. Not to worry, Lord Peverell and I have a noose around his neck, and eventually, we will pull on it."

Griphook smiled a feral smile and nodded.

"Well Griphook, Harry and I have had enough of exams as of recently. That being said, we do wish you success in them."

"Thank you. The rumour is that you Lord Peverell have Goblin ancestry" Griphook said quite solemnly.

"That is a bit of a joke. I think the exaggeration is made as I see eye to eye with the goblins. So does Hermione. I think rather the Goblins are no-nonsense, practical and pragmatic folks. And because our lives in the mundane world demand these skills of us, we will always see eye to eye even if we disagree on something. I think we can always be civil.

The rest of the morons in the magical world? We cannot speak for them. But if we continue to our usual mischief, they will be forced to talk to us eventually, on our terms" Harry replied gently.