SSS-Ranked Summoner: Only I Summon All Heroes And Heroines Of Legend-Chapter 30: Mission Failed

The undercover espionage was on.

Delilah stood in the hallway outside Master Oz’s office, her conceal skill active which made her completely invisible to any observer, the corridor was empty. But she was there, pressed against the wall, studying the door.

It was locked, of course. But locks were just too easy to someone like her.

She placed her palm flat against the wood and felt the mechanism inside. A simple tumbler lock enchanted with basic wards. Nothing she couldn’t handle.

She whispered a spell and the lock clicked open.

The door swung inward silently.

Delilah slipped inside and closed it behind her.

Looking around, the office was nothing short of a generic professors work space, classic dark wood furniture, bookshelves lining every wall, packed with tomes on summoning theory, planar mechanics, and combat doctrine. A large desk sat in the center of the room, covered with papers and correspondence.

She moved through the room like smoke, her footsteps making no sound. 𝒻𝑟𝘦𝘦𝘸ℯ𝒷𝑛𝘰𝓋ℯ𝘭.𝘤𝘰𝘮

Her attention turned first to the desk.

She rifled through the papers carefully, making sure to leave everything exactly as she’d found it. Most of it was mundane, Final year student evaluations, specific esson plans. Requests for additional funding for the Slykhar house.

Nothing really suspicious.

She opened the drawers one by one, but she only found more of the same.

"!"

Then she noticed something.

The bottom drawer was shorter than the others. Not by much, maybe half an inch. But enough to be noticeable by someone of her skill level.

Delilah knelt and examined the drawer more closely. She pushed against the back panel, and it gave slightly.

"Trrk"

Revealing a hidden compartment.

She slid the false back aside and pulled out a stack of papers bound with string.

Her eyes narrowed as she flipped through them.

These weren’t lesson plans.

They were investigations.

Detailed notes scrawled in Master Oz’s handwriting, diagrams sketched in the margins. The subject matter was strange. It wasn’t precisely the Codex, but clearly something extraterrestrial. References to "incursions from beyond," "planar distortions," and "anomalous entities."

Then she found something...

hieroglyphics!.

A single pattern, scribbled on multiple sheets of paper. The same symbol repeated over and over, as if Oz had been trying to memorize it or decode it.

Delilah pulled out one of the sheets and held it up to the light.

She felt her anxiety spike, Oz was definitely connected somehow, but she needed more.

There were photographs too, really old ones. Half scripts of the same symbol captured from different sources across different eras. One photo showed the hieroglyph carved into an ancient stone tablet. Another showed it etched into the wall of a ruin. A third showed it painted on parchment that looked centuries old.

Master Oz had been researching these symbols for a long time.

Delilah carefully placed everything back exactly as she’d found it, then moved to the bookshelves.

She scanned the titles. Disappointingly, most were standard academic texts.

But she wasn’t done yet, she needed something more concrete, to know the extents of Oz’s knowledge, and if he had contacted the herald.

She realized that if she wanted real knowledge, she had to extend her search to his residence.

Immediately, she filtered out of his office, leaving everything exactly as she had found it.

---

Master Oz’s Residence - Moments Later

Delilah stood at the doorstep of a black building that looked like it descended from an older era.

It was built with the architecture of a castle—stone walls, narrow windows, heavy wooden doors—but awkwardly, it scaled down to the size of a single-story home. The whole structure had an ominous weight to it.

She activated her skill first.

Whispered Insight.

Her perception expanded, spreading through the entire building like a web. She could sense the layout, the structure, it was completely empty at the moment.

And something else.

There was a void in her perception. A space beneath the house concealed by low level magic when compared to her.

A secret underground shaft

Delilah proceeded to enter, bypassing the door entirely.

A Violet seal appeared beneath her feet and she phased into it, her body dissolving into shadow and reforming on the other side.

The interior was sparse. A sitting room with minimal furniture. To the left was a small kitchen that didn’t look like it had been used in weeks. And upfront , a hallway leading to what she assumed was a bedroom and study.

Delilah moved through the house quickly, searching for the entrance. She found it in the study, hidden beneath a heavy rug. A trapdoor with a simple latch.

She scanned again, and the concealed spell revealed itself to her.

Without hesitation, she teleported right in, bypassing the trapdoor seal.

---

The underground chamber was larger than she’d expected.

It stretched beneath the entire house, walls lined with shelves even more grand than Master oz had in his office, multiple tables covered in research materials were arranged in rows. Enchanted candles floated in the air, casting flickering light across the space.

This was where Master Oz did his real work.

Delilah moved through the chamber slowly, observing and taking note of everything.

There were patches of half-maps on the wall that didn’t show details of the Academy or the surrounding region, these maps showed details of planes. Alternate dimensions, each one marked with notes in Oz’s handwriting.

She saw classified reports, documents stamped with official seals, clearly stolen or copied from top rank archives. They detailed extraterrestrial incursions. Events where beings from other planes had breached into their world.

One report described an incident twenty hundred years ago where an entire village had vanished overnight, replaced by a crater filled with strange black sand.

Another detailed a "summoning gone wrong" that had resulted in the death of twelve students and the permanent closure of the Heilger Academy, an event that occured a century ago.

Delilah pieced it all together

These weren’t isolated incidents.

They were part of a pattern, while the world was engrossed in their quest for power, something bigger pulled the strings from behind the curtain.

She moved to the next table and found more research. Notes on the birth of alternate planes, theories about how summoning worked on the most fundamental level.

And then she found something that made her stop cold.

A conspiracy theory about the Summoner’s War.

---

The notes were fragmented, written in a hurried scrawl like Oz had been racing against time.

---

"The War is not what they claim. It’s not a conflict between families. It’s a ritual. A mass summoning event designed to thin the veil between worlds."

"Someone is orchestrating this. Someone who benefits from the chaos, and I must find what it is, I must meet them, before they come."

---

Delilah’s took a pause.

She checked around the note if she would see something that have away the date.

She found,

Nothing.

Master Oz had been researching the watchers.

But something still remained unclear...

Had he found them?

Had he contacted them?

Is he in league with them or against them?

What more isn’t written in these journals?

The more she read, the more questions arose.

With this however, she could understand the depths of his work.

She flipped through more pages, her hands moving faster now.

There were dozens of hieroglyphic patterns here, far more than she’d seen in the office. Oz had been trying to decode them, to understand what they meant.

And then she heard it.

A thud.

Something had moved within the drawer of the largest desk in the room.

THUD

It struck again, she moved quietly and steadily anxiety creeping into her already troubled mind.

She looked at the drawers, one had slightly buldged. Surprisingly, it was unlocked. She pulled it open with a slow creak.

And inside she found, a thick piece of clothing, wrapping something spherical. It had several tags over it, from their looks they were sealing tags.

But still, she could feel it.

A very malicious energy that oozed from the object so bad it made her eyes blurr.

Delilah wiggled her head to clear her vision. Her mind raced, warring between curiousity and an institution that opening it was a very bad choice.

Her hands extended shakingly to the out wrappings.

Then —

She felt it before she heard it.

A presence.

Behind her.

Delilah spun around, her concealment was still active, keeping her body invisible.

But the man standing at the base of the stairs was looking directly at her.

Master Oz.

He stood perfectly still, his robes flowing around him like liquid shadow. His eyes, sharp and ancient, were locked onto her exact position.

At this point, the heroine’s heart pounded.

How?. Her first task now looked like a suicide mission.

She’d scanned the entire building before entering, and she was certain he hadn’t been here. Otherwise she would have sensed him.

But there he was.

"Who, are you," Master Oz said slowly, his voice calm but filled with a hostile aura, "and why are you here?"

Several glowing seals materialized around his fingertips, rotating slowly like orbiting planets. Each one spun with raw mana, ready to be unleashed.

Delilah didn’t move.

She couldn’t.

It was confirmed, he could see her.

Even through her concealment.

"I asked you a question," Oz said, his tone sharpening. "Answer, or I will make you answer."

Delilah’s mind raced. She could fight. Try to escape. But this was Master Oz. An S-rank summoner who’d been teaching combat for decades.

She wouldn’t win.

And then, just as she was about to speak...

---

Daeryion Dormitory - Same Time

Altair sat on his bed, flipping through his system interface.

He was reviewing Delilah’s status, checking her mana levels, making sure everything was...

Her signature vanished.

It wasn’t depleting.

It just, Vanished.

Like she’d been cut off entirely.

Altair jerked upright, his heart slamming against his ribs.

"What?" Finn asked from across the room, looking up from his book.

Altair didn’t answer.

He concentrated with everything he had to sense her signature. Still he picked up, nothing.

Like she had simply ceased to exist!.

"Something bad has happened," Altair said, panick and urgency filled his tone.

Finn sat up surprise. "What do you mean?"

Altair was already on his feet, grabbing his jacket.

"I have to go."

"Altair, what’s going on?"

But Altair already bolted out the door.

It was risky, it was urgent.

But,

he needed to be there.