The healing potion.
While healing magic did exist, it was either Twilight Healing, or slow and inefficient such as how Rias seemed to need to sleep next to the person and use her demonic energy to heal them.
There were probably more healing methods, especially for Angels. He had no idea if the Fallen could heal or not and the Angels was really just a guess.
There was also probably a breed of Yokai that could heal too. Still, a simple potion anyone could drink to heal injuries? Should be worth a fair amount of money.
Granted, a single lesser potion probably wouldn't sell for all that much since it would only heal minor injuries and they couldn't just be chugged over and over to heal any injuries. Real life didn't work like video games. Taking more than one healing potion, of any strength, without the proper nutrients readily available could cause all kinds of issues. Though that's what nutrient potions were for! Selling two potions to handle one job efficiently. That sounded like a nice bit of money. Perhaps he should give smithing a break and switch to potion brewing.
He continued to waffle back and forth as he stepped into the dining room. A single inhale through his nose had him letting out a little groan of pleasure. Mittelt seemed to be really going out with making dinner tonight. Their relationship hadn't changed all that much over the last few days, why would it? Though, Mittelt had taken to small little things to try and annoy him. For example, she'd started going all out to make the most lavish, hence delicious, meals. Not because she wanted to feed him good food, no, because she wanted an excuse to have him wash a bunch of dishes.
It wasn't every meal that Mittelt went all out on, but when she did... She might have been trying to annoy him or something but he couldn't care less. Let her make a mountain of dishes. He'd happily spend the next two hours washing them all with her delicious meal resting in his stomach. He'd never dined in a five star fine dining restaurant in either life, but he imagined that Mittelt's all out cooking was right up there with those places.
As he sat at the table, Mittelt came out of the kitchen with the last plate filled with food. Lucky for him, the food budget was pretty big and there were always left overs of Mittelt's cooking for lunch the next day. As she sat across from him, he could see the knowing smirk on her lips.
It didn't seem to occur to her that she put just as much effort into cooking the meal as he would into cleaning it. Or at least, that was how it used to be. With his new ring he'd have an even easier time of cleaning up later.
Once she was comfortably sat, she gestured to the food, "Dig in."
Junichiro started collecting bits of the different dishes onto his plate while he addressed Mittelt, "I was wondering something. I'm kind of waffling on what I want to make and sell."
Mittelt gave him her full attention at that. This was definitely a part of her job working with him. Seeing she was focused on him, he continued, "At first, I was thinking of continuing what I'd done before, kitchen knives and the like.
But, now I'm wondering how well something like a healing potion would sell? Not something super powered but good for cuts and bruises or at least partially closing a more dangerous wound in an emergency."
Mittelt hummed for a bit as she thought that over, "Well, things capable of healing are pretty rare. There are some Sacred Gears that can, but not many.
And each race has their own little things they can do, but it's never enough. So... yeah, I think something like you're describing would sell pretty well. Though the strength of it doesn't sound like it would be worth a fortune. Can you produce it in large quantities?"
Junichiro nodded along as she spoke, it was about what he figured, "Yeah. I can make large batches really easily. Maybe sell it in bulk with a dose size?"
"Does the dose matter?"
Junichiro nodded vigorously, "Very much. Too little is useless. Too much can, potentially, be deadly. The healing potions I can make use the bodies resources to repair the damage with a smidgen of help from magic. Taking too many too close together can lead to some serious deficits in a bodies reserves. You have to replace what's lost before you can take another dose. Basically, just like any other drug in the world. Too little is useless, too much will kill you."
Mittelt nodded at that, "Makes sense. Well, if you can make a big enough batch, it'd probably sell for a decent amount. I say, go for it."
Internally, Mittelt was really starting to see what had caught Azazel's attention. This kid, a kid with no training or history with the supernatural, was doing the impossible. People had tried to make potions and items that could heal before, some with small success, but nothing had ever come close to Sacred Gears, Angelic healing, or the occasional gifted Yokai. Many had tried, few had ever had minor success.
Yet here was Junichiro talking about healing potions as if they were a foregone conclusion. There was definitely something extremely odd going on here. She'd keep a closer eye on the kid to see if she could figure anything out.
Junichiro moved through his lab looking over the various ingredients he had available with a bright smile on his face. He hadn't stopped smiling after he'd seen the pout Mittelt had given him when he used his minor telekinesis to wash the dishes last night. She'd looked really adorable doing it, and the look of rage when he'd said so was priceless.
Now though, he was focusing on making a nice sized batch of healing potion. Finding good ingredients was a bit of an issue. The recipes he'd gotten from the Essence were useless, naturally. But his knowledge base was enough for him to make it using replacements. He just needed things with the right properties.
Speaking of, he collected an herb that helped with blood clotting, "That should be enough."