Chapter 10: Fault Line

“I am positive this barrier which contains me has vulnerabilities ” Izumi said. 

Her voice was calm—but tight like she was holding it together on purpose. “Ones that we could exploit. I think we should test it.”

I blinked.

“Uh… okay ” I said carefully. “What exactly would those weaknesses be?”

“When I cast Magicka ” she began then paused—just a fraction of a second—before continuing. 

“Different forms cause different reactions. Sigillic Theurgic… each one produces a brief distortion in the barrier. It is subtle but it is there.”

I frowned trying to picture it.

“Our tether has changed as well ” she added more certain now. “It has strengthened. Not gradually—discretely. As if it has crossed a threshold. That increase may be sufficient to induce instability.”

My brain started buffering.

“If we synchronize your aura with mine ” she continued momentum building “I believe I can project magic outward through the barrier—not fully but enough to create a momentary gap. The tether may act as a stress point. A fault line.”

She kept going.

About resonance. About feedback. About how the Mirror Realm responded differently depending on intent versus structure. How it resisted Magicka—but not connection. How the barrier didn’t block power so much as redirect it.

I was doing my absolute best to keep up.

“Wait—wait hang on ” I said throwing up a hand. “You’re going way too fast.”

She stopped immediately.

“If this is going to matter ” I added already backing toward the door “I need to actually understand it. Let me get my notebook.”

I darted out of the room attempted one of those tactical slides that only ever work in your head and grabbed the spiral-bound notebook off my desk—the one with the crappy Gundam stickers peeling off the cover.

It had never seen any real use.

Until now.

Izumi had me drawing up all sorts of crazy diagrams and had me writing things down in the margins.

Even my notes had notes...

But for what it’s worth, I got the feeling that she had a pretty good idea about what we could and couldn’t really do.

I’d thrown myself headfirst into Izumi’s world—Epithar as she called it.

She said I might already know more about Epithar than half the scholars at Magnaria's top schools.

I told her that was a reach. A huge reach.

Izumi just laughed and told me to "get used to being underestimated by your own potential."

Whatever that means.

But yeah. This was real. 

The mirror. 

The magic. 

The tether. 

Her.

Somewhere along the line I stopped doubting it. Not because I had proof.

Because I had purpose.

Because we were fighting side by side.

The gears were spinning in her head.

She was deep in thought.

Her lips moved silently.

And suddenly… she smiled.

Or tried to.

It came off more like an unhappy grimace than anything else but it was the face of progress.

Progress. Progress. Progress.

I nodded seriously jotting down everything down.

There were no mistakes.

We would do it.

I’d make her smile. Even if it killed me. (or …even if I had to do it alone.)

“I would rather risk perishing while attempting to be free than rot behind this cursed fenestration another day.”

My throat went dry.

What do we need to get started?"" I managed to choke out.

A spell that won't damage the mirror but will affect the barrier she replied.

My mind scrambled.

Water or light.

Water bent. Light cut.

“That’s it ” I muttered.

I didn’t hesitate. I formed an aquasphere and hurled it at the glass.

It splashed harmlessly against the surface—until Izumi reacted.

The moment she saw it she cast in tandem. The tether between us snapped tightly humming like a live wire and a thin fracture shimmered into existence between our worlds.

A fault line.

An opening.

Izumi screamed.

Not at me—don’t get the wrong idea.

When you try to force open a construct that was never meant to be breached screaming just comes with the territory.

As strong as her resolve was she knew this would change everything. There was no clean escape from something like this. No undo button.

Normally I’d crack a joke right about now.

This wasn’t the moment.

I had to hold it together—for her.

Izumi was right.

Our tether ballooned expanding violently and suddenly I understood: I wasn’t just helping her.
I was the conduit.

A vessel. An anchor. An external force she could lean on.

That was why the spell chain held.

That was why the air around me erupted into overlapping flares of heat pressure and light slamming into me from every direction.

I staggered.

I had to keep her alive.

Izumi cried out the final syllable of Aura Schism—a diagnostic spell meant to expose weaknesses in magical structures.

She pushed it through the tether.

I felt it hit me.

Not pain. It was more like weight. 

Her magic flooded into my body, foreign and overwhelming but precise.

Step two.

Rupture Expansion.

My palms ignited. Not fire—stress. Like holding a live circuit in my hands.

I gritted my teeth and didn’t let go.

“Rift Dilation!” I shouted forcing the words out. “Stasis Loop!”

For half a second nothing happened.

Then Izumi laughed.

Not relief. Not joy.

Pure, unhinged laughter.

The barrier lurched.

A hairline crack split the mirror and spiderwebbed outward.

Crap.

My hands were on fire. Actual screaming agony.

Izumi forced another surge through the opening.

The floor trembled beneath me.

The Mirror Realm fought back.

She’d described the energy matrix once—like a self-healing wound endlessly trying to close itself.

Now I felt it.

The system rejecting us.

Correcting us.

This entire attempt was an anomaly.

If we slipped—even for a second—we’d lose control.

Or worse.

The room began to shake violently.

“Hold on!” I shouted.

Izumi screamed again.

That was all either of us could do.

The walls warped. The air bent. The mirror shrieked under the strain.

Another crack.

The barrier was failing.

The world wasn’t.

It was moving faster.

“Breaking point!” I yelled. “The mirror’s going to shatter—Izumi it’s now or never! Jump! NOW!”

She didn’t hesitate.

The sound—

There isn’t a word for it but I'll try anyway.

The mirror split in two then boomed outward. Shards tore free in a blinding storm slashing into my arms as I was thrown backward.

I hit the bathroom floor hard.

All the air got sucker-punched out of my lungs.

My hands burned. My chest nearly gave out. Breathing felt wrong.

Then I heard her scream again—closer.

“Izumi?”

I turned my head. She was there.

Not reflected or trapped.

There.

I dragged myself toward her ignoring the cuts in my knees and the blood that pissed out from my hands and arms.

Her aura was weak; it was barely there.

A gentle, shallow breath through the tether.

But it was there.

I reached out.

“Hey ” I croaked. “You did it. You made it out.”
Nothing.

“Izumi ” I said again quieter. “You made it.”

No—

I pressed two fingers to her wrist.

A pulse. Weak. But real.

Her fingers twitched.

“…Kei…zo…” she whispered.

My chest seized.

She was here.

At a cost I didn’t fully understand yet.

She’d burned herself down to nothing—like a candle pushed too close to a flame.

The only reason she was still breathing was—

The tether.

Somehow it hadn’t snapped.

I rested a hand against her tummy feeling it rise and fall shallow but steady.

The corner of her mouth lifted just barely.

And the thought hit me cold and heavy:

What did we just break?