awesome chapter

Hold it just one moment! If Medusa has all the powers that she has when she was alive than that means she has to have all the powers from the various classes she can be summoned under. If that is the case than when things get crazy she should deck most of the competition! She should be at Fate Grand Order levels of power which should get the attention of Gaia and Alaya as Grand Order Servants are equal to a Type! Also I do not think you are getting Rider's personality right. Rider is silent, sultry, and vigilant, never hesitating to shield her Master from harm. She is always faithful to her Master, even with Shinji acting in that role most of the time. She is not openly talkative, and she prefers to analyze people and their actions. She is very protective of Sakura and willing to sacrifice herself for Sakura's happiness. She is very logical and she doesn't act out of anger or instinct.

Let me give you the powers she has as a Rider class servant and you may see things my way.

Rider fights with a low-risk and high-return type of warfare that is not fixated on the methods used to win.[11] She fights mainly with a Nameless Dagger (無銘·短剣, Mumei Tanken?) in close combat that is more likely to be called a "nail" rather than a "dagger." It is attached to a long chain that can restrain and immobilize targets that she pierces. It is not suited to short-range battles, instead best utilized as a thrown weapon from a distance.[12] It is not a Noble Phantasm, and while its origin is unknown, it is thought to be a weapon that reflects her inner character. She boasts outstanding speed, moving like a bullet and racing around the battlefield. She is faster than Lancer in terms of average speed, but he will surpass her in immediate maximum output. Due to her nature as a Gorgon, she has a monster alignment that may make fighting battles against monster exterminators, such as against an expert like Lancer, tough for her.[13] While she is normally blindfolded, she perceives the world through hearing, touch, smell, and magic-detection to have an even more precise outlook than with sight.[8]

She is a unique Heroic Spirit who displays a great variety of skills and Noble Phantasms that are particularly high numbered even amongst other Servants, all of which are traces left from her time as a goddess. Due to her status as a former earth goddess, she has a strong connection to the earth, sensitive enough to its state to be able to sense disturbances in Fuyuki's leyline.[14] Due to her contract being passed to Shinji, her abilities are lowered, and she must seek out alternative means of magical energy. While she takes blood for the most part, she is not a Dead Apostle, but rather a bloodsucker whose most efficient manner of gaining energy is through drinking blood.[9] Her main offensive Noble Phantasm is Bellerophon, which allows the Pegasus to use an extremely powerful charge that resembles an arrow of light. She also has use of Blood Fort Andromeda, a Bounded Field designed to collect life energy from whoever is inside. Once it is set and activated, it can instantly liquefy any normal humans inside and convert them into energy. Breaker Gorgon is another Bounded Field that seals the target inside the user's mind. She mainly uses it on herself in the form of a visor to seal her Mystic Eyes.

Cybele

Cybele (キュベレイ, Kyuberei?), the Mystic Eyes of Petrification (石化の魔眼, Sekika no Magan?), are Rider's Mystic Eyes, said to be a "curse of the gods sealed by the powers of shrines." Though petrification sorcery is no strange thing for modern Thaumaturgy, even if its users are rare and few in numbers, Mystic Eyes capable of petrifying others are something that nobody, human or not, possesses in the present era. They are designated as Jewel under the Noble Colors system, which surpasses the Gold-ranked Eyes of the Dead Apostles and are exclusively possessed by Holy Spirits and Magical Beasts from the Age of Gods. Their nature is strong enough a mystery that Shirou mistakes the identity of Breaker Gorgon as the eyes themselves.

The eyes, almost too abnormal to be called eyeballs, are gray with an appearance similar to crystals. Despite their abnormality, Shirou believes that they are too beautiful for any human to possess, and could either be art the gods admired or a nature they cursed. The corneas do not take in light, and the pupils see the world through a square. The irises are solidified, not allowing the eyes to close, and the millions of cells that make up the retinas are composed of the Sixth Imaginary Element. It affects all targets within the owner’s field of vision, regardless of whether said targets are looking at the Eyes physically, or if they have their eyes closed but continue to view her with their mind's eye, as it is a curse to look upon her in any way. The only way Perseus was able to avoid her gaze was by utilizing his mirror shield to find her location without looking upon her at all.

Those who possess Rank C or lower in Mana will be immediately petrified, while those with Rank B may or may not be affected depending of the conditions. Those with Rank A or higher won’t be petrified, but will sustain "pressure" from the Eyes and receive a one rank-down to all parameters. The entire body of the target will be affected, including clothing and weaponry, "killing them while alive" as they are turned to stone. The ability is viable in petrifying a group of enemies, but it would not be useful against an infinite number like the horde of shades spawned by Avenger. The amount of energy it uses is comparable to also fighting them off with her Noble Phantasms, so it would quickly drain her faster than simply fighting them off in melee combat.

When Archer, with Rank B Mana, is affected at close range, he instantly feels the effects. He is immediately is frozen in place, unable to close his eyes or cover them with his arms even if he wanted to do so due to being unable to move either in the slightest. He tries to charge at her afterward, but his legs are already petrified up to his knees at that point. He is petrified up to his waist only a moment later before the effect is canceled. Shirou and Rin feel the effects instantly when targeted further away, barely or unable to move as their blood starts thickening. It immediately starts solidifying the flow of Shirou's body and ceasing his senses. If he tries to run at her, his body is instantly turned to stone, and his mind swiftly follows. He is only saved when Sakura acting up causes Rider to cease her activity.

She is unable to control them in any manner on her own, requiring the use of Mystic Eye Killers like Breaker Gorgon or the glasses and contacts she later replaces it with after the Holy Grail War ends. Knowledge of the eyes render further attacks less potent, but it is not enough to allow Rider to go without Breaker Gorgon in their presence. Repeating the initial surprise effect would be impossible, making it possible to act without going completely numb and causing the effect of the petrification to go at a slower rate. The effect will be magnified again should the person's guard be let down.[15] It is possible to cancel the effect if it has not reached a certain point by closing her eyes. In the case of a lessened effect like when Shirou accidentally walks on her bathing, it starts to spread up his legs and is too far gone to simply close her eyes, but she is able to cancel the effect by sealing them with Breaker Gorgon. It takes some time for the petrification to recede, and she mentions that it would have been bad had it affected his heart.

With her Riding skills, she can ride on animals and vehicles, allowing her to mount creatures on the level of Phantasmal Beasts and Divine Beasts. She uses an unlisted, innate ability to bring forth the Pegasus given to her by Poseidon, initially thought by Shirou to be her main Noble Phantasm. It actually lacks any sort of name, and it is treated much in the same manner as her dagger. Having remained since the Age of Gods, its abilities are far beyond those of a normal Pegasus that would only be limited to the strength of a several hundred years old Monstrous Beast had it been one of the few remaining Phantasmal Species from the current age. Increasing in strength as it has lived, it has the strength of a Phantasmal Beast far beyond something like Invisible Air that could defeat a normal Pegasus.[16] If left without the ability to readily use a strong Noble Phantasm, it easily overwhelms Saber and leaves her in a position to only bide her time and wait for a mistake on Rider's handling.

Its strength is nearing that of the level of dragons, the strongest of the Phantasmal Species, and its defense has already reached that level. It is made of enough energy to have come from several hundred magi, and constantly emits it while it flies. It is a divine mystery with magical protection even greater than that of Saber, who displays the strongest resistance of the Holy Grail War, allowing it to easily brush past all thaumaturgy without issue. Not needing to halt its charge against anything, it is much like a giant castle wall crashing down on the opponent and leaving them no method of dodging or defending. Too powerful to defend against, even the trail of its charge is enough to damage a Servant. It destroys its surroundings just by moving, scorching the area around it. The buffets from its wings are capable of generating massive shock waves, which raze infrastructures and lacerate the bodies of living beings.

Despite displaying this overwhelming ability, it is a docile being unfit for combat. For it to truly attack, she must use Bellerophon to compel it. It is brought forth by slashing her neck with her dagger, allowing the blood to spray out and stop in the air to form a magic circle. The circle, which displays a creature-like figure, swells with a large amount of magical energy that makes up the Pegasus, far surpassing Blood Fort

Great work so far, I'm looking forward to more. Quick question, was Hermione vulnerable to Lancer's Mystic Face?

Great story. I'm looking forward to more.

great chapter

love the beginning

Question: How old is Harry? I always thought that the Fourth War took place in the 90s. Though, if you're updating the timeline to the Ufotable productions, then I assume it's more 2002/3?

It's hardly relevant, but...Eh, plausibility and realism.

If you go past the fourth and into the fifth war, bring in Teddy. It would be funny to see him getting under Shinji's skin by getting more female attention than him without trying.

Knowing things, I suspect that Tokiomi changed his will, establishing Harry as the Guardian of Rin and the Overseer of Fuyuki until Rin reaches the majority of age if he and Aoi died.

Good stuff

Yay!

I wonder if Illya will have the chance to actually grow up this time...the stated reason for her child like body in cannon was due to manipulations to make her a better master and more efficient lesser grail...so those modifications probably took place sometime shortly after the fourth war.

How does Medusa know so much about the other Heroic spirits? Like knowing their noble phantasms and stuff.

Wonderful!

Interesting concept. I hope to see more of this.