(Sike, i was amassing chapters to publish in on Friday)
Rias asked "How and why did you eat a whole fallen angel?" when she regained her senses
"Well i ate him because he attacked me, and the how is a little more complicated, so like i already said i before was a soul leech, basically i was feeding in energy, what type doesn't matter, when Issei died and you made ma devil it also improved my racial abilities now not only i can feed on energy but on matter as well, and obviously this has benefits like for example this"
I put Fallen angel wings on my back "Now i also copied his powers"
She's now more shocked "How is it that you haven't exploded?"
"What did you expected something so simple to kill me? I don't think you understand how old i am… I literally have leeched on energy from Gods, a little fusion of Holy and demonic energy isn't going to damage me"
"Wait do you mean you could copy the powers of gods?"
"Of course, but i would need either Blood or flesh of them to eat and my body to adapt, hell if you want, give me a couple of vials of your blood and i can copy all your bloodline related abilities"
"What? You can copy Bloodlines powers of Noble Devils!"
"Of course, i only need either Blood, Flesh, Bones or anything that has his DNA and i can easily copy it"
"Why were you even on Issei on the First place?!"
"I literally told you his energy was yummy, do you know how hard it is to find something more powerful than gods? He had the boosted gear and now is mine" i said as a gauntlet appears on my left arm [Boost]
"You have a longius!"
I think that's enough surprises for now because she looks like she's gonna have a heart attack
So i said bye to her and went to my new house (Issei's)
In the middle of the night i felt something trying to enter my bed
I opened my eyes to see Rias totally naked trying to get into my bed sneakily
First i scanned her with my eyes so i have the images in the library… but the i breathe very profoundly
I really want to say fuck it and have sex with her but if i do i will never win her heart and that worst
"What are you doing in my bed naked?"
"I thought that you were probably hurt during the fight with the fallen angel so i should cure you sharing my demonic energy with you?"
"Ok and whats the real reason…?"
"I wanted seduce you?"
"No don't do this bullshit tell md the REAL reason"
"I need your help, there's this pervert idiot that is forcing me to marry him just because we're "noble" devil but the only way i can get freedom is by fighting him in a rating game and i need someone strong like you"
"Look ok, i get it i will help you and everything is ok, but you sneak again naked in my bed and that night you lose your virginity"
She got embarrassed and used magic to teleport herself away while blushing
Now that i have time for myself i relax then i create a Cooking talent(SS) and then went to the gate that is already full of Knowledge for DxD and compiled perfect Ki, Chakra Senjutsu, Touki and Youjutsu control techniques
Then i went for Holy, Light, Lightning energy control techniques
Then Devil Energy and Destruction Power control techniques
Then Body strengthening techniques for everything Reflexes, Speed, Strength, Vitality
(And you have to remember that there's a lot of pantheons in DxD verse including the Chinese one that has Cultivation and Sun Wukong)
Finally i created the perfect Unarmed and Armed combat techniques
and slowly started practicing everything, i spent 25 hours (till it was eight in the morning outside the gate) and obviously even though i didn't master it (because they are perfect and perfect takes time it was enough to be able to teach it like i was a sage that trained in all that for hundreds of years)
So i went outside the gate and after school i went to the Student council room (i had the meeting) and learned a lot of how devils use magic, basically most devils are lazy and don't train but for example let's say that to make a fireball you need 1000 units of demonic energy that what devils do they just imagine a fireball and forcefully put 1000 units of energy, you want the fireball hotter? Put more energy in it and here's the twist the form they train is they do the same spell thousands upon thousands of time because eventually you end up learning about it, and that reduces the amount of energy required because they can imagine the fireball more easily and because of that they reduce it from 1000 to 500, but obviously there's a cheat way but it hard word and no devil is going to work hard, you need to learn like basically if i need a fireball and i know what fire because i have study it in science class then it easier for me an i can start with 600 units to make the fireball and by the time they reduce it fromm 1000 to 500, i have reduce it from 600 to 200
Devils are a bunch of idiots… they won't get stronger because it's beneath them to study like mortals do… they are probably mocking Sona and Rias for attending a School but in a thousand years when they are the best at magic they will start crying that the power came from their pure bloodline
I had another chess match were Sona losed again and then i left to the occult club room were i found Rias peerage sitting and having tea… like they don't have a worry in the world…
"Ok everyone stand up, Rias if you want my help i will give it but right now you need training and that what i will provide, i have almost 200 years of experience eating, controlling and sensing energy so i will train each of ever one of you to be the best of the best so get up and let's start training NOW!"
and thats what i did, i started training them all (separately with clones) Physically Kiba and Koneko thrived there then. I moved on with Devil energy and then went with specialized for everyone Kiba got Swordmanship, Touki and Speed and Reflexes training
Koneko Unarmed Combat, and how to use demonic energy to temporarily strengthen their bodies (also i sneak in some techniques to calming the mind that will help her when she starts learning Senjutsu)
Akeno got almost a full course on everything but i concentrated more on her elemental magic and how to improve it (using techniques that will help her with her more "Holy" inheritance)
Rias was the worst because she had no physical condition and basically only fights with her Power of Destruction so i treated her the harshest I trained her body her mind and even her soul, physical training, magical training, strategist training everything she's gonna need to ve the best if herself, they only lasted 6 hours , i let them rest for two and they went to make contacts (because it was nighttime already) but not before saying to them "this will be diary routine"and they all groaned at me
"What? Do you want to be stronger or not?"