I don't own Fate/Grand Order or it's related fandoms and characters. The same applies to any other fictional work(s) that may be referenced. And be warned that some non-OC characters might be OOC.

Chapter 11

I'm really grateful to have Medea as an ally.

If it wasn't for her, I have no idea how many times I would've died in this battle alone.

She managed to support me by distracting the beast with her skeletons, healing me, buffing me up and using her own magical attacks to cause significant damage on our enemy, and without her I'm very aware defeat was the only end.

And thanks to the armor that she made, we turned the battle around.

After all, while in the beginning the flaming Fenrir had the absolute advantage in terms of strength, speed and endurance thanks to the Holy Flames powering him up and his own nature, as the fight progressed, the armor absorbed more of the Divine Beast's power.

And with it, the Holy Flames were also sucked by the armor, strengthening me and weakening my foe.

After a few minutes of fighting, Fenrir corpse dispersed into dust and was absorbed into the armor together with the last remains of the Holy Flames.

The armor, now giving off a powerful aura, metamorphosed. The white, sturdy plates refined from countless bones became crystal like, and golden flame patterns appeared on them. I could feel the power coursing through my body, and it was exhilarating.

"Excellent."

Both myself and my partner turned to look at the now standing giant, who was smiling creepily at us.

"Now, let's begin with the real fight, shall we?"

I looked at Medea, and she nodded at me.

Then, as she took flight once more, I charged at the last enemy that stood between us and the end of this eternal winter.

In Proper Human History, Surtr was a Fire Giant. He was responsible for destroying Asgard during Ragnarok.

In this timeline, he was born as an Ice Giant, who sought not only the destruction of the Norse pantheon, but to cover the entire planet in ice, showing his might for all of eternity.

But to not be pruned by the Will of Humanity, he made sure to leave a small window of salvation for this frozen lands.

Although the normal living beings are trapped, they were all kept alive by the Holy Flame, that throughout thousands of years, accumulated their unconsciousness wish to free themselves, giving birth to Ignis and creating the opportunity for us to materialize.

All those things put together led to this moment.

And now…

We were being played by the colossal being.

Medea's attacks and my own indeed damaged him, but his body was so big it amounted to little more than scratches.

Medea's Noble Phantasm wasn't as convenient now, and whenever we got hit, well…

Now I understand how a fly being struck midair feels. Fortunately I didn't experience being crushed under a boot like an ant, and the armor protected me from most of the impact.

But we were only stalling the inevitable. The only way to possibly defeat this thing would be using a powerful Anti-Unit Noble Phantasm.

But I hadn't manifested one yet. I could feel it was close, just outside of my grasp. I needed some time to focus.

"Medea! I have an idea, but I need you to distract him! Can you do it?" I whispered to her when one of his backhand hits threw me in her direction.

She paused for a moment, before nodding. "If I use my fake Noble Phantasm, that should give us a brief respite. It will only happen once, so your plan better be good!" Then she turned to Surtr and summoned a dragon. For a moment, the dragon stared at us before it was hit by the enemy, then it started madly attacking the giant.

After composing myself, I closed my eyes, and reflected on my reasons to fight here.

'To protect those who can't fight for themselves.'

I didn't notice the flame like patterns manifesting on my forehead.

'To bring light to the life of the people who were trapped in darkness for countless years'

My sword, once a seemingly normal katana, now glowed a deep crimson.

'To melt the ice from which was born despair, using the flames born from hope'

I opened my eyes.

"Dance of the Fire God"

And with grace that I couldn't achieve before, regardless of how much I tried to copy Ignis moves, I blasted towards the giant.

Medea had noticed the magical pressure that Jacob was releasing, and realised he was going to use his Noble Phantasm. Although she was curious about it, considering his legend is not one the Grail informed her, she focused on her task at hand.

Although the Colchis Dragon was not under her control, Surtr fortunately acted as she expected and attacked it regardless, causing both to fight. But the legendary creature wouldn't stand much of a chance against any version of a being famed for bringing an end to an entire pantheon of gods.

So she supported it by harassing the giant, stopping him from dealing the final blow, until Jacob finished his preparations. As she felt the change in the air, she retreated in time to hear Jacob call out his Noble Phantasm, and the giant noticed it as well, his eyes widening at the amount of magic her ally was releasing, but it was too late.

With speed that even she had a hard time following, the swordsman charged at their titanic enemy, and with one flaming slash, he cut the giant in half.

Without even a last scream, the monster who kept an entire world frozen was killed, dispersing in golden light, and from the slash Jacob performed, the Holy Flames left his body and spread outwardly, not burning anything, but rather getting rid of the cold that used to be present at all times everywhere they went on these forsaken lands. As she left the cavern with her companion, Medea and Jacob met Kori outside, playing on a flower field at the foot of the mountain, before the little ice spirit ran to them excitedly.

Thanks to them, for the first time in thousands of years, spring finally arrived.

It was quite the novel experience for the witch, to go on an adventure to save so many for no other reason than it being the right thing to do, especially with the nature of the Grail Wars she is used to being summoned in.

It felt really refreshing.

And as she watched her own form slowly disappear in motes of golden light, and the same happening to her two companions, she gladly bid her farewell to the cute red haired samurai, and his fluffy and white familiar, before finally returning to the Throne with a smile on her face.

She hoped her path would cross with theirs once again.

Yay, another chapter done. To clarify, Jacob's hair was originally brown, but due to Ignis' blessing it became completely red, and his green eyes became more like charcoal. His face remains the same though, and Chaldea will realize that.

Here's the current stat sheet for after the battle, now that he's going to his develop his Lancer Class NP:

Class: Type-Earth (Lancer)

Origin: Modern Age (Age of Humanity), Ancient Greek Mythology, ?

Alignment: Neutral-Good

Gender: Male

Parameters

STR: A- | END B+

AGL: A | MP: B+

LUK: B | NP: N/A

Class Skills

Sub-Class System (C): Allows a servant to take on the attributes of 4 different Classes among the main 7. In Jacob's case, the available classes are Assassin, Saber, Archer and Lancer.

Personal Skills

Gaea's Blessing (EX): For the purpose of aiding the World, Jacob was chosen by Gaea to become Her avatar on the fight to come. This Skill is the Grace She bestowed upon him to help him grow. All sorts of Skills can be acquired and grow up to B+ so long as Jacob trains them enough. All Parameters aside from LUK can be trained to B+ so long as Jacob trains them enough. To achieve a higher rank on both Skills and Parameters, a notable feat worthy of a legend must be accomplished.

Presence Concealment (C): Hides one's presence as a Servant. Suitable for spying. The rank of Presence Concealment drops considerably when preparing to attack. Due to being summoned at least once as an Assassin for his sub-Class, this Skill has been granted to Jacob, though should his sub-Class change, the rank of the Skill will be dropped by one.

Magic Resistance (B+): Cancel spells with a chant below three verses. Even if targeted by greater magecraft or Greater Rituals, it is difficult for them to be affected. Originally, Jacob had no Magical Resistance due to being a modern Heroic Spirit, but because of his Skill Gaea's Blessing, he was bestowed with the lowest level of Magic Resistance and managed to raise it's rank after enduring many magical attacks through his journey. As this Skill has reached the maximum level without legendary feats on it's base form, it'll retain it's rank regardless of sub-Class.

Riding (C): One can flawlessly manage beasts and vehicles if they have received the proper training and adjustments. Most vehicles and animals can be handled with above average skill. However, cannot ride the likes of Phantasmal Species such as Monstrous Beasts. Due to being summoned at least once as a Knight Class for his sub-Class, this Skill has been granted to Jacob, though should his sub-Class change to any Class different from Saber, Lancer or Archer, the rank of the Skill will be dropped by one.

Independent Action (A+): The Servant can operate without a Master. With a Rank of A+ that exceeds even A, the support of a Master is unnecessary even while unleashing a large amount of Magical Energy. It is an ability that bends the rules and allows for the continued materialisation of Servants even after the conclusion of a Holy Grail War. After enduring a long period of time without a Master, thanks to Gaea's Blessing, Jacob has been bestowed with this Skill.

[NEW] Blessing of the Fire God (A): Acknowledged by the Fire God Ignis, Jacob was bestowed with the ability to wield godly flames through swordsmanship. His Attributes also receive a boost whenever this Skill is put into use.

[NEW] Protection from Arrows (C): Moderate chance of automatic evasion against thrown weapons that comprise arrows.

Noble Phantasms

The Oath of an Assassin (EX - Assassin sub-Class Exclusive): There are three verses in the oath. The first, "Other men blindly follow the truth. I know that nothing is true." allows Jacob to break out of any illusion or Reality Marble, as it denies both. The second, "Other men are bound by morality or law. To me, everything is permitted.", gives him the ability to break free from anything physical or mystical that might be binding him. And the third, "I walk in the shadows, to serve the light. I am an ASSASSIN", greatly increases Jacob speed and strength, which allows him to deal significant damage to the enemy, and it can also create a zone of darkness should Jacob desire, to aid him in his attack. However, unlike spells where the more verses, the more powerful the magecraft, should Jacob choose to chant more than one verse, they must be chanted according to the order they were made, and the power of the verse(s) that follow the first to be chanted will be greatly decreased.

Dance of the Fire God (EX - Saber sub-Class Exclusive): Calling upon the apex of the swordsmanship according to the path developed by Ignis, the Fire God born in an alternate timeline, Jacob can deal a strike capable of burning even Gods to ashes, but only so long as his heart remains righteous during every step.

Holy Armor - Fenrir (EX - Saber sub-Class Exclusive): A samurai armor without helmet crafted by Medea, a witch born during the Age of Gods, using the remains of the Divine Beast Fenrir. It has been permanently fused with Jacob's Legend thanks to a Magical Source on the level of a Holy Grail, and equipping it grants him immunity to all fire and curse damage of rank A and below. If he expends Magical Energy, it can heal him from all damage suffered in battle. It also makes all non-Divine wolf creatures weaker than Jacob to submit to his commands, and makes Divine wolf creatures friendly to him unless attacked by him or commanded by someone else.