FGO System in the Type-Moon World

Tamamo had already begun constructing their base.

Reiji, as her Master, was undeniably a magus.

But this kind of large-scale setup wasn't his specialty.

Rather than getting in the way, it was better to leave it to her entirely.

That said—

He wasn't completely idle either.

Just like when he had summoned Berserker, this time, after summoning Tamamo, the system had rewarded him again.

[Congratulations, Host, for Summoning a Servant]

[Reward Acquired—Mystic Code: Chaldea]

As a veteran FGO player, Reiji immediately understood what this was.

In the game, it had three main skills:

Momentary Reinforcement– 500% Chance to increase one ally's attack for 1 turn.

First Aid – Restores a significant amount of health to a single target.

Emergency Evasion – 500% Chance to grant one servant Evasion for 1 turn.

Though these skills had lengthy cooldowns, their proper use and timing were essential for early-game Masters.

But now—

This wasn't a game.

It was real life.

And the Mystic Code was now his to use.

Alone in his temporary quarters, Reiji held out his hands over the table.

With a flicker of light, a white jacket and black pants appeared before him.

They looked a little different from the game's version—

Likely customized by the system to fit his physique.

"Hmm…"

After a moment of thought, Reiji removed his worn-out casual clothes and changed into the Mystic Code.

After all—

Regardless of its abilities, having something was always better than nothing.

The moment he put it on, a strange sensation ran through him.

A cool energy surged within his magic circuits, synchronizing with the Mystic Code.

Then—

His mana pool skyrocketed.

Or rather—

It wasn't that his mana had increased.

It was that his mana had linked to something else.

Something far greater.

Something he could draw from limitlessly.

And after a brief moment of thought, the answer was obvious—

"If the Chaldea Mystic Code was connected to Chaldea in the game…"

"Then this one must be connected to my system."

If his mana was now linked to the system itself—

Then his mana reserves had essentially become limitless.

"Heh."

With a smirk, Reiji cracked his knuckles.

If only he knew actual magecraft—

He could probably fight a Servant one-on-one right now.

But he didn't dwell on it.

He wasn't the type to waste time overthinking things.

With that thought, he turned his attention to something else—

A new stream of knowledge had just entered his mind.

It was information about the Mystic Code's abilities.

It was system-generated, meaning it could not be damaged or destroyed.

Its three core abilities remained unchanged—but their real-world applications differed from the game.

The Attack Boost now lasted for an entire day, but could only be used on one target per day.

It was not restricted to Servants—it could be used on himself.

Reiji grinned.

This…

Was going to be very useful.

But each subsequent use would double the mana cost.

The healing skill followed the same rule—no cooldown, but using it again would require double the previous mana cost.

The evade skill, however, was limited—only one use per target per day.

Yet its effect was drastically enhanced—

For one full minute, the target would evade all attacks.

If used on multiple targets, it could be activated consecutively, but the mana drain would be immense.

After reading the skill descriptions, Reiji Souma couldn't help but laugh.

Sure, he had no formal magecraft knowledge.

He had no idea how many Magic Circuits he had or his total mana reserves.

But he didn't need to.

Because the system had all the mana he would ever need.

The third skill—Evade—was downright broken.

In the heat of battle, or when an enemy Servant unleashed their Noble Phantasm—

He could instantly activate it.

Unless the enemy had Sure Hit or Pierce Invincibility, he could completely negate any attack.

The first two skills would need testing to gauge their true effectiveness.

Attack Boost in the game was a percentage-based buff—here, it was listed as a 100% boost.

How well it would actually work in combat remained to be seen.

Healing was even harder to measure.

Magus like Irisviel were capable of healing Servants, but how much he could heal would depend on actual usage.

But overall, this Mystic Code was a massive asset.

The Evade skill alone gave him a strong self-defense option.

And with that—

His anticipation for the upcoming Holy Grail War only grew.

Killing a Master couldn't be repeated for achievement rewards.

But if there was an achievement for killing a Master—

Then killing a Servant had to have one too.

And each Servant kill granted one Saint Quartz.

With three Quartz, he could summon again.

The only question left was—

Who would the Grail choose as Ryuunosuke's replacement?

Honestly, it didn't matter.

Because whoever it was, as long as they were his enemy—

He would crush them all the same.

With that thought, Reiji suddenly frowned.

His Command Spell-bearing hand instinctively clutched his wrist.

A flash of red light erupted, accompanied by searing pain—

New crimson markings formed on the back of his hand, pulsating with mana.

He had seen this sigil before.

It wasn't just any Command Spell.

It was originally Ryuunosuke's.