My Upgrades Are Invincible

I was getting along pretty well with Caster Nero as she bounced around the room and somehow Tamamo's 'housewife' senses allowed her to somehow find a buried refrigerator that was beneath some rubble and once we removed the debris, we found some well-preserved eggs and other breakfast food that Tamamo whipped up into a scrumptious meal for us all while Cu was working on engraving some runes on some tiles that were laying around.

I was watching Cu's actions closely as I literally didnt have my own magic system to dip into, though honestly I could perhaps go to the actual world where the first 'Gamer Ability' was born, have him add me to his party and then with that minimal version I can go back to Danmachi and have Hestia and Freya engrave The Gamer ability into my Falna and make it my own, which would allow me to create my own magic and become much stronger.

Grimoires back in Danmachi aren't just rare or expensive, no they are one-of-a-kind tokens of magic that basically engrave a person's understanding of magic within and everyone who is capable of creating them, have to spend a month or two focusing solely on making said grimoire.

Thus, people don't 'sell' them at all, they are all traded basically for divine favors like for the creation of Miach's sole member of his Familia, Naaza's prosthetic arm that could grow with her similar to the Hestia Knife but to a much smaller extent.

In other words, even with all the connections I had back in Danmachi I still wasn't able to get my own Grimoire as only Aisha was able to snag one that Ishtar had mind broken some poor fool for which was instantly given to Haruhime, which gave her, her nine tails.

I wasn't sure how to approach Caster Cu as although he was certainly more chill than his Lancer self. He was still... Well, he was Cú Chulainn and no one who fucks with him or steps on a trigger button gets off easy.

But just hanging around awkwardly would be even worse...

"Yo Caster could you teach me how to use Primordial Rune's?" I asked flippantly and Cú's hand slipped when he was engraving a rune onto the tile and the tile crumbled into ash's making the man curse.

Olga, who was a traditional Magus knew the sheer value I was asking as modern 'magic' had backslide to the point of almost fading to oblivion and was basically only kept alive by careful eugenic breeding between the families to keep their magic strong and only taking in the best new blood that went to study at the Clocktower school of mage craft, to keep any issues from cropping up with inbreeding.

She instead of reproaching me for asking for such instructions or trying to get in one it took several steps back and literally sat down behind Mash and the other girls.

Cu turned slowly to look at me and he asked quietly. "Do you know the value and history of what you ask of me to teach."

I nodded knowing the history of the Primoradial Runes quite well in this world as they are mentioned several times and even if I can't use their world altering properties on a large scale in other worlds, I could still inscribe them onto my equipment to boost it further.

And most importantly it will help teach me more about the manipulation of mana in more quantified means when I eventually go to worlds with more easily obtained magic.

"Why should I teach you... No actually with Humanity in ashes, I don't have much of a choice in being picky in 'who' I could teach..." Cú Chulainn paused as I was sitting across from him and after a few moments he shrugged with a sigh.

"Alright kid, if we both survive this hellhole and get back to that Chaldea place, I will setup some tests and I will teach you the basics." Cú said shrugging and brushing his hand through his hair as he knew quite well that runes if used appropriately could make miracles in how they could augment the suits me and Fujimaru were wearing and give us the equivalent of a second life.

In the end, the vast majority of the Servant's within the Throne of Heroes would do all they could to save Human History, not only for humanity's sake but also so that the trials they went through in life wouldn't be forgotten.

After a bit more talking with Cu and learning about one another I convinced him I wasn't a pansy researcher who would hoard the knowledge of the runes and would almost certainly die atop a battlefield bring 'glory' to said magic and lessons he would impart to me.

Which... Let's be real with the shenanigans I get involved with purposefully, I am certainly going to die after tweaking the beard of some arrogant god or become one myself.

-

"Alright let's get a move onto the Einzbern Castle, kill Hercules eleven times, pillage the libraries and hopefully snag some mystic codes or knowledge on the Grail that Chaldea can use." I said as we moved out of the building with Tamamo and Cu taking the front and Nero and I leading up the back as frankly Olga and Fujimaru were helpless should a Servant like Assassin or Archer sneak attack them should they wander a bit away, so Mash was nearby them in the middle of our little formation to protect them.

"By the way Cu, has Assassin been killed yet?" I asked and yes... He was very dead, apparently Hercules didnt take the corrupted Assassins attempts to steal his previous master's corpse all too well.