After hearing the story from Kiba other members of the peerage were shocked they knew Issei wasn't weak in fact he was the strongest in terms of raw power due to his balance breaker said to be the strongest form a sacred gear user can use and not only that it appears he knew about Issei Sacred Gear.
Rias: Is he a devil? If he is why would he become the principal of the school?
Kiba: He is not I couldn't feel any demonic energy from him at all I doubt he is a devil if he is he must have a concealment skill that of high devils perhaps on the level of your brother
Risa: I might have to tell my brother about him but he might remove me from the city I can't risk it we will observe him for the time being if we find any suspiciousness from him will report it. Koneko observe him if anything happens tell me.
Koneko: Ok
They all agreed and return to their work while Kiba brought Issei to the medical room
Issei woke up while feeling the pain from the strike of the old man
Issei: Damn it that old man was no joke and he wasn't even a devil what is he
Ddraig: Even I don't know my partner but it seems he went easy on you if not you would have died"
Issei: Yeah I know so what should we do
Ddraig: You can only train and get stronger after all you are the red dragon emperor
At the principal Office
Reinhard: I shouldn't have challenged Issei now much trouble will brim"
Reinhard thought while slowly rotating his chair to the back at the window
Reinhard: Well whatever comes I will deal with it
Reinhard turned back his chair and got up he went through the hall and waved at some students while he was taking a walk outside he could feel a presence observing him
Reinhard: So they sent you to observe me
Koneko was hiding in a tree up as she observed him, the old man had a scary aura if not for her will being a little stronger she would have filed earlier. Koneko was curious about the old man as he bought some cookies from a nearby food cart that was near the school it often sell desserts or cookies
Reinhard stretched his hand with a cookie
Reinhard: Do you want some
koneko was startled the old man knew he was being followed left with no choice koneko moved quickly to the old man and took the cookie
Reinhard: Why did they send someone like you to observe me
Koneko answered nothing at all while Reinhard was confused he decide to give up on it
Reinhard left koneko with her biscuits while he was walking he was thinking about the future
Reinhard: According to the Future memory the next event will be the Demonic beast Riot it will be fun to face Cao Cao and test the true longinus I doubt Isse even though he has the Cardinal promotion his physic is still weak"
Reinhard smiled a bit as he then disappeared.
Issei had completely healed and returned to the club but this time he was surprised
Kuroka and Lay fay pendragon with ophis were at the front of the door
Kuroka: Hello Issei it's been a while
Issei: What are you doing here? and why did you bring Ophice
Kuroka: Although I'd like to chat let's do it inside
They went Inside while straightforwardly Ophis went for the cookies while Kuroka told the peerage what going on. Apparently the Hero Faction, after their defeat in Kyoto, grew tired of following Ophis' orders as they sought to use the Infinite Dragon God's power for their own end, making a deal with Hades to use Samael in order to obtain Ophis' power.
Vali, learning about this through his own connections, sent Ophis to the Hyoudou residence as Ophis was interested in the current Red Dragon Emperor's growth.
Suddenly while partying the dimensions were trembling while magic was increasing a gap formed opening to reveal two figures It was Cao Cao and Georg
Cao Cao: Yo Ophis
While Cao Cao was talking Georg immediately launched fire magic at her which she negated along with that attack Cao Cao attacked with True Longinus but it Ophis remained Undamaged suddenly space Distorted it was then Vali appeared. Xenovia instantly deployed Durandal and went for Cao Cao
Cao Cao: Such a fool you are
Cao Cao Immediately changed the Longinus to it's orb form destroys the sword and stabs Xenovia
ORC: NOOOOOOOO
Cao Cao: Hmmm Foolish hero that fell for the devil
Cao Cao immediately sealed Rias and Akeno's power to prevent any counter
Kuroka: We need to attack La fay Know:
Kuroka and La Fay attacked but failed as Cao Cao redirected the attack by teleporting them in front of Asia
Issei: Draig now!!
Ddraig:[ Boost: Balance Breaker: Welsh Sonic Boost Knight]
Issei immediately sped to save Asia in time.
Reinhard was in a separated dimension as he observed the whole fight he had judged it wasn't time to interfere he then created a chair as he sat down
They were fighting a losing battle as the fight continued Cao Cao exchanged Georg with Siegfried and the Gream reapers arrive
La fay runs towards the beaten-down Xenovia with Irina
La Fay: You need to warn the other factions I will teleport you to them
While Issei was fighting Cao Cao he used Cardinal Crimson Promotion
Ddraig: You need to get out of here Issei you can't defeat him yet
Issei: I know but I can't leave them yet
Issei was exhausted with all the promotion he used plus many enemies had joined the fight it seems like this was the end of ORC Issei was fighting shall suddenly in between their fight
a void appeared from the void was an old-looking man
Reinhard: Damn I guess I got to take care of this mess
Reinhard extended his hand and muttered [ The Cane Of Sage] a cane of wood appeared
everyone in the battle felt immense power falling above them a huge portal appeared taking the entire mountains and lands into the underworld
Reinhard: This fight will continue here, but let's see how you can do oh Hero Faction. Come to me scroll of Reincarnation
A gigantic scroll appeared while all of a sudden gigantic thousand hands appeared from him but they instantly disappeared
Cao Cao: Everyone stops that old man
The Grim reapers started running towards the man but it was a too late zombie-like creatures made from the flesh of the dead devils turned into monsters that give sheer terror to them they destroy each other
Reinhard: Come to me [ Eight Letter of Tathagat: Fifth Holy book]
Cao Cao was feeling shivers using his orbs he attacked the old man but it was useless
Reinhard: You can't even use the spear true power you don't deserve it
The orb disappeared and appeared above the book of the old man.
Reinhard: I will teach you a lesson young one
Reinhard: [Baekdu]
before he could even defend he was sent flying to the ground the damage from the kick broke one of his ribs before he could even fall Reinhard used [Bo-Bup] to appear behind him and went for [Spinning Top Kick] Cao Cao managing to defend still suffered immense damage to his face he was bleeding from his nose.
Reinhard: You are quite resilient for a young man
Reinhard: [ Golden Needle from Mystery Island] a giant needle appeared piercing through the sky directly pressing Cao Cao through the ground forming a giant hole to the ground while Cao Cao was rendered useless Reinhard faced the next enemies
Reinhard: Come to me [ Lecalicus] release yourself and devour them
Different from the original seven dragons appeared from the sword and devoured everything enemies leaving Azazel and the ORC shocked never had they seen a force changing a disadvantageous situation
Siegfried and Shalba fleed while the Grimm reapers were devoured those who fled were met with Reinhard [ Zahard Style lethal Control skill-Comos] rasing half of the underworld after the battle he used his cane and brought everyone back Rias and others were shocked but they needed to save Issei since he was poisoned with poison from Samael but they could see the old man carrying Issei
Reinhard: We meet again Young Gremmory
The most spectacular fight in the underworld had ended