Information (Contains Spoilers)

Guidebook:

Zelretch and Great Red's Class Card:

This Class-card is different from the original one. While its basis is the same, the power and the nature of it were boosted by the Great Red himself, the strongest being that can destroy the planet without problems, he is probably beyond Ultimate Ones from FSN.

Instead of transforming people (like Illyasviel von Einzbern in the spin-off) this card turned the human user into the incarnation of a Heroic Spirits, however, please note that it takes time for the people that are given such cards to reach the power of Heroic Spirits. They may gain a boost in their status, but they still do not yet possess their respective Noble Phantasm. This is because the card needs to bond with the user's soul, which is not an easy task. Also, Sacred Gears may hinder the fusion. Especially ones with soul like with Hyoudou Issei.

The reason why Zelretch planted it inside a young Issei was not just so Issei would gain a boost in power but also necessary since it took a long time for the card to fuse due to Ddraig's presence. Once the fusion is complete, the user will able to use the Noble Phantasm of the Heroic Spirit within the Class-card.

After all, Noble Phantasms are the represention of a Hero, so it was bound to their souls and can't just be given to people permanently with ease. Also, the stronger the soul in a Sacred Gear, the harder it is for this process to finish.

The origin of these cards is a mystery and how they work is also unknown, even the original one that Zelretch created can't be analyzed and scanned by the Mage's Association in any manner. However, it's clear that Zelretch created this by stealing part of Ajuka Beelzebub's research and the Heaven Brave Saint from another universe since he used them as inspiration.

In simple terms, this card turns the person it is given to into a Heroic Spirit, giving them a boost in power. And while it's true that they will possess higher power, they don't instantly gain their full skills or Noble Phantasms. It takes time for them due to the Heroic Spirit inside the Class-card having to fuse with the vessel's soul. If the person possesses Sacred Gear it will take longer due to Sacred Gear being bound to the user's soul and interfering with the process.

Currently all Cards still exist and only the Blank-class Card was used for Hyoudou Issei. The Blank-class Card is a special card that contains not just one Heroic Spirit but multiple, depending on what the user is suited for. In Hyoudou Issei's case it turned into Archer. It possesses parts of the Heroic Spirit EMIYA, the embodiment of Shirou Emiya's ideal of justice and Gilgamesh, the King of Heroes. All Heroic Spirits inside other Class card are still a mystery and unknown, however, it's sure EMIYA or Gilgamesh won't become the Heroic Spirits inside the Archer-class card.

Rankings:

These are the parameters that I use for this story. I decided to copy Demon Lord Hero's way to write about ranking and everyone's status since I think his ranking are easy to understand and also reasonable. And I already asked for his permission to copy his writing so there won't be a problem.

There are five main Rankings E, D, C, B & A

Note that the gaps between ranks are large. So much that it is more than possible for a competent fighter to defeat several opponents that are only a single rank beneath him.

E = The base value and it is estimated to be 10 times more powerful than an average human.

D = High class Devils

C = Ultimate Class / 8-10 winged Angel

B = Maou Class / 12 winged Angel / Lower Gods

A = Super Devil / higher Gods / Evil Dragons

EX = The 'EX' rank is applied when the power cannot be classified in the normal system and is in a league of its own. While it can be applied to extremely powerful creatures such as the Great Red, it also includes abilities that are simple too unique to be properly measured such as 'Time Travel' or an ability that grants you the power to always be slightly stronger than the opponent you are currently facing.

'+' = The plus sign indicates that under certain circumstances, the Stat may exceed the designated rank by up to, but no higher than one rank. For example, a devil bishop's speed can increase from an E Rank to a D Rank when flying in the air if the devil is a highly skilled flyer. In such a case, a rank of E+ would be awarded.

'++' indicates that the Stat may increase by two ranks, while '+++' by three.

'-' = The minus sign indicates that the Stat doesn't completely qualify for its rank either due to it being too weak for the rank but too strong to justify a lower ranking, or has a flaw or weakness that prevents it from completely qualifying for the Rank. For example, a devil knight may have a C rank in endurance, but due to the inherited weakness of the legs for knight classes, the devil's legs may only qualify for a D rank in endurance. In such a case, a rank of C- would be awarded.

The gaps in power between Ranks also increase as they get higher. For example the difference in strength between E and D rank is many times smaller than the difference between B and A.

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The Current Data of Our Protagonist as of Chapter 2

Status:

Name : Hyoudou Issei

Master : Kischur Zelretch Schweinorg & Great Red *The latter unofficial*

Alignment : Neutral Good [Chaotic Good]

Class : Archer

Race : Human (Heroic Spirit given flesh much like Gilgamesh after Fate Zero)

Strength : D+ [B+]

Endurance : D [B]

Agility : D+ [B]

Mana : C- [B+]

Luck : E to A+ [B]

[Using Gilgamesh Card]

Sacred Gear / Weapon / Ability

Boosted Gear (EX)

One of thirteen Longinus-class Sacred Gears, an item that is capable of slaying even God. Sealed inside it is the Great Welsh Dragon, Ddraig, the Crimson Dragon Emperor that is capable of killing gods. The Boosted Gear grants the user a "Boost" every 10 seconds, doubling the user's power. When entering Balance Breaker, it increases the number of the Boosts that can be used and also increase the body's status so it can hold multiple Boosts.

Currently Issei is already able to perform Balance Breaker and maintain it straight for two weeks if he only does daily routine stuff, which means no training and living like a normal person. His body strong enough to endure the power oft he Boosted Gear unleashed, however, he still can't control such a large amount of power. His body is still not accustomed to the strength inside of him, proof of that could be seen when he faced Mittelt. It was pure luck that he didn't kill her since logically Mittelt should have died from his attacks.

Issei prefers to fight with his Class-card ability rather than this since it's harder to control and he only uses Balance Breaker as last resort, facing mindless beast or fighting someone who is a "Power Idiot", at least until he able to control it.

There is a last and forbidden stage, Juggernaut Drive, a state where the Boosted Gear unleashes the real power of Ddraig, grants the user the raw power and strength of the Crimson Dragon Emperor himself. But beware that it also contains the madness and hatred of Ddraig when he was sealed as well as the previous users of the Boosted Gear.

Issei still has a long way to go to master this ability. If he were to unleash Juggernaut Drive, he could only rampage for 1 hour before the effect of it would start to drain his life force and 5 minutes later he would die.

Unlimited Blade Works (E — A++)

Unlimited Blade Works is Issei's main weapon other than the Boosted Gear. This is similar to the Reality Marble and ability of Counter Guardian EMIYA where he created manifestations of his soul, a place that is surrounded by countless swords, weapons; an armory that he copied and created duirng his life.

Currently Issei is still unable to access the Reality Marble because his power was just released fully, he will need time to process and observe this Reality Marble before he is able to master it. Issei's own Reality Marble still doesn't have a shape and thus exists as a complete copy of EMIYA's for now. He is also currently only able to trace twelve projections and shoot them at same time but it will increase in time when he learns more about his ability.

Authority of the Supreme King of Mankind, Treasure of Humanity's Greatest King : Gate of Babylon (E — A+++)

A Gate that is filled with humanity treasures, weapons, gems, shields, armors, items and other things. Its name not just title, metaphor or exaggeration but the truth as the Gate itself contains all the treasures of the world.

In this form Issei is able to use the Gate like the King of Heroes himself, using all the treasures and deadly weapons to fight for him. It also turns Issei into a demigod that possesses 2/3 divine blood, giving him a large boost of power that surpasses anyone's expectations.

Other than Balance Breaker, this skill is also Issei's last resort. Unlike when activating Unlimited Blade Works, Gilgamesh is far more difficult to control. The moment Issei actives this, Gilgamesh's prideful personality will slip into his mind and turn him into a person almost like the Golden King himself.

For that reason this ability is locked away by Zelretch and Issei agrees to this, however, Issei can unlock it whenever he wants and set a timer when it will stop. But beware, every time he uses this ability the more difficult it will be to regain his original personality, that's why Issei uses this power as another last resort.

Skills:

Natural Body (C)

Issei's body was influenced by the Blank-Class card ever since he was young. The Blank-Class inside him modified his body and gave Issei's own body a boost power. The card turned his normal human body into that of a Servant with E- parameters the moment it was planted in him. It not just affects his body but it also affects his mind and soul, making anything he easier to learn. Since the Blank-class card was already unlocked, the effect of this was slightly decreased.

In simple terms, the Blank-class card gives Issei almost a normal supernatural being's body, but he retains his humanity. How it works is a mystery since this card was created with the help of the Great Red, unlike the Class-cards that Zelretch originally created.

Divinity (B)

This is only gained the moment Issei actives the power of Gilgamesh. Originally he was supposed to possess A+ ranked Divinity due to possessing 2/3 divine blood, however, due to his dislike of gods it is reduced to B.

Eye of the Mind *False* (D+)

Issei gained this the moment his Blank-class card turned into the Archer-class, giving him the mind of a Heroic Spirit and the experience. He might not be experienced like veteran warrior, but this level is enough to make him stay calm to analyze his situation instead of panicking.

Clairvoyance (C)

The Blank-class card that turned into the Archer-class card gave Issei the ability to possess "Hawk Eyes". He is able to see details as far as four kilometers away or probably more, however, he is only able to shoot his target with high accuracy if the target within those four kilometers.

Unique Magecraft (E)

Issei possesses knowledge of magecraft from the Nasuverse because of Archer's knowledge and being taught by Zelretch himself. He doesn't possess much skill save for Reinforcement and Tracing that he gained from the Archer Class-card for now.

Magecraft of DxD Universe (E)

Issei is not proficient in magecraft, but he is still able to learn it. Currently he is able to create small sparks of different elements, such as small amounts of lighting or fire if needed. He is also able to fly using this, though currently it's more like floating rather than flying.

Host of the Great Crimson Dragon Emperor (A)

As possessor of the Boosted Gear that carries Ddraig, Issei carries the aura of the Welsh Dragon himself. The Great Welsh Ddraig's power and dominating aura was so great that even sealed he is still able to emit a strong pressure. This aura mostly affects animal-based creatures, as for high level beings, it will install a small fear inside of them no matter what. The aura of the Heavenly Dragon that was feared even by gods is enough to make normal beings tremble or even piss themselves.

This could actually be a blessing or a curse at same time. Issei can use this aura to intimidate others and even make High-class Devils freeze in fear, and even a few dragonss are going to bow down to him due to his very potent aura.

However, it also acts like a curse if the opponent is an experienced enemy and not easily intimidated. They might even take Issei seriously from the beginning, making Issei lose his advantage of being underestimated. Kokabiel, the Lord of Stars, is one such being that won't be intimidated easily. And not just that, due to possessing the Boosted Gear Issei becomes vulnerable to dragon slaying weapons, making them one of his biggest weaknesses.

Magic Resistance (C-)

Originally Hyoudou Issei's magic resistance wasn't high, but due to getting the Archer-class card, one of three Knight classes, he gets a D-ranked magic resistance. However, it turned to C- due to Ddraig's presence inside him interfering with the fusion. The aura of the dragon also gives Issei a strong magic resistance. At this level only High-class devil able to harm him and even they have to focus their attacks/spells slightly in order to harm him. If Issei holds Kanshou and Bakuya at the same time, the High-class devils have to focus fully in order to harm him.

Tactics (D)

Issei learned many things from the memories of Counter Guardian EMIYA. He uses EMIYA's experience and tactics in battle as his own. If the tactic proved to be useful he will use it but if it might end in failure he will avoid using it and try to find a way to undo the mistake or how to use the failure to make another plan.