The sixth and seventh floors passed faster than anything below them had.
This wasn't because the enemies were easier—they weren't—but because Constantine was no longer building his approach from nothing. The Wraith class interfaced with his instincts cleanly in a way the Ghoul class never had. Intangibility removed most of the defensive problem that had defined his early days in this dungeon. Spirit Drain addressed the attrition issue that came from extended engagement without recovery options. Hollow Sense removed the category of ambush entirely.
He moved quickly and consistently, and the Levels accumulated.
The impatience was harder to manage than the combat.
Everything he knew about the Rank 5 Adventurer told him he was operating against a timeline he couldn't precisely calculate. The man had tracked a Ghoul through solid dungeon rock and corrected for Ghost Step in real time. He had read a cleared Boss Room as empty only because the Wraith's baseline suppression had exceeded his detection ceiling—a margin Constantine couldn't assume would hold at higher Adventurer Levels indefinitely.
Capable people didn't abandon active investigations.
'I need to be in a position to deal with a Rank 5,' he had concluded before leaving the sixth floor, and the conclusion hadn't shifted. What had grown more complicated with time was the precise path to it.
If he advanced his Undead class at Level 100, he would become something capable of engaging a Rank 5 in a direct confrontation. The progression was there. But advancing his Undead class at the Level cap meant forfeiting the option to return to human form at the same threshold, and everything he had understood about this world since the floating old man had outlined the terms of the deal told him that human registration was a prerequisite to everything else.
100 Percent Completion required active involvement in the world's systems. Registering as an Adventurer. Completing quests through official channels. Accessing territories and mechanics gated behind legitimate identity. All of it required a form that could pass through a city gate without triggering an armed response.
He could not achieve any of it as a classified monster, regardless of how strong he became.
He had always known that.
The System chose the seventh floor's quietest stretch to weigh in.
[System Notice]
{Host, I've been reviewing your situation honestly, and I think there's something worth considering. Your current class has extraordinary capability that a human form at Level 1 simply cannot replicate. Given what's currently hunting you, the human path carries significant risks. Why limit yourself? You've already become something remarkable. Embrace what you are. :)}
Constantine read it quietly.
Then he closed it.
The argument was constructed around his actual problem, which was precisely why it had arrived now rather than at any earlier point. The System had correctly identified the Rank 5 situation as a genuine vulnerability, and it was using that vulnerability as the premise for steering him toward an outcome that served neither his completion objective nor his return to Earth.
Staying Undead indefinitely satisfied one condition—survival—while foreclosing everything else. The deal with the old man didn't pay out for surviving a dungeon. It paid out for completing this world.
'You're not wrong that I have a problem,' he thought toward the notification. 'You're just wrong about the solution.'
He dismissed it and kept moving.
The problem of the Rank 5 remained on the table regardless, and it required a real answer rather than a dismissal. He thought through it across two more cleared sections of the seventh floor, testing different approaches against what he knew about the Adventurer group's capabilities and the dungeon's structure.
Fighting them directly was not viable at his current Level. Even at the ceiling of his Wraith class, a Rank 5 with four Rank 4 support represented a combat situation with too many variables operating against him simultaneously.
But the fight didn't have to happen on their terms.
The dungeon's geometry was information he held exclusively.
Hollow Sense gave him real-time awareness of the Adventurer group's position without exposing his own. His Subspace was stocked with materials accumulated across multiple floors, including ore and crafting components that didn't require the Forge to repurpose into something useful—because chemical reaction wasn't the same mechanic as forging, and fire-oil was a crafting material with properties that existed entirely independently of a System-managed workstation.
He had been moving through this dungeon for weeks.
He knew exactly which sections of the seventh floor's terrain were structurally compromised at depth.
'I don't need to win a fight,' he thought, as the approach settled into clarity. 'I just need to make this floor very difficult to traverse for a specific group of people.'
He stopped between the seventh floor's descent passage and the next Danger Zone and began working out the specifics.
…..
Edric had been in enough dungeons to recognize the sensation before he could name it.
It arrived before training gave it formal classification—a current in the ambient fabric of a space that distinguished purposeful recent movement from ordinary environmental variance. He had felt it consistently across the lower floors, faint but directional, oriented downward and slightly east with the specificity that meant a deliberate entity rather than passive dungeon activity.
"The signature changed," he said, during the second day of the seventh floor.
Mira fell into step beside him. She was the group's most reliable analyst after Edric—Rank 4, with a detection Skill that had complemented his own throughout the search. "Changed how?"
"It was Ghoul-range when we first entered. Whatever we're following now isn't." He paused at a junction where the current was strongest, oriented precisely, then continued east. "The fundamental thread matches—it's the same entity—but the classification shifted entirely at the point where we lost the trail after the Litch chamber. Substantially more suppression in the new signature."
"Class Advancement," Mira said.
"The only thing that produces a shift that complete." He moved through the junction without slowing. "It planned this. The concealment improvement wasn't incidental to the Class Change—it was the reason for it."
Gareth, the heavyset man at the rear of the formation, had been listening without contributing. "If it advanced after the Litch, it cleared the Litch alone."
Nobody responded to that directly.
The arithmetic was uncomfortable regardless of how it was framed. A dungeon classified for Novice Adventurers had produced an Undead entity that cleared a Litch chamber without a party, executed a Class Change during an active pursuit, and disappeared into the lower floors with enough compositional intelligence to read their tracking capabilities and account for them.
Edric had stopped describing the entity as a dungeon monster three floors ago.
"Seventh floor descent is sixty meters ahead," Mira said, checking her map. "The signature is getting cleaner the further east we track. Less interference from native population density."
Edric nodded. Familiarity with a space left an impression in its fabric, and whatever they were following had established significant presence on the lower floors. The sharpening thread was consistent with time spent rather than direction of movement—they were getting closer to the entity's current operating territory, not just its recent path.
"It knows we're here," Mira said.
"It's known since the fifth floor." He had no illusion about the entity's awareness relative to their own. Something that could vanish from a cleared Boss Room during an active breach wasn't operating without real-time dungeon intelligence of its own. "The awareness is mutual. What matters is whether it can translate awareness into action at the range we're currently—"
The floor disappeared.
Not in stages—a three-meter section of the corridor surrendered structural integrity simultaneously across its entire span, stone dropping away cleanly beneath all six of them at once.
Edric caught the pit's edge with one hand on reflex and arrested his descent, but the others hit the base of the drop—twelve feet of stone-floored shaft—in rapid sequence around him.
He registered the heat signature an instant before the first detonation.
Around the pit's inner perimeter, set into the walls at measured intervals, were compressed fire-oil vessels. He recognized the components. He carried four of them himself for breach operations. Whoever had placed these had sourced them from dungeon drops and positioned them with the spacing of someone who understood the blast radius and had calibrated for overlap.
They went off in sequence, the chain completing the perimeter loop in under one second.
The fireball expanded upward through the corridor above and downward into the pit simultaneously, folding back on itself as secondary charges he hadn't identified contributed to the cascade. The corridor they had just been walking through became a column of fire and displaced air that registered through the stone walls as a sustained physical pressure.
Smoke pressed downward into the pit.
Edric dropped from the edge and absorbed the landing, assessing his team through the haze. Everyone down. Mira had a fragment wound on her left arm that was past minor. Gareth was upright and favoring his right side but functional.
The remaining three were in various states of recovery, none critical, all compromised.
No follow-up came from above.
He waited thirty seconds with his detection Skill fully active.
—Nothing.
The entity had not stayed to observe the result at close range. It had set the trap, withdrawn to a safe distance, and continued moving—treating the ambush as a delay mechanism rather than a combat engagement. It hadn't tried to finish them while they were down. Either it couldn't, or it had calculated that the delay itself was sufficient for its purposes.
Both possibilities were worse than the alternative.
Three hundred meters east, suspended inside the dungeon's stone above the descent passage, Constantine felt the six signatures stabilize inside the pit through Hollow Sense's awareness.
All present.
None eliminated.
He hadn't built the trap to kill them—the structural positioning and charge calibration had been set for incapacitation and delay, not lethality, partly because killing Rank 4 and Rank 5 Adventurers would generate a response that made his current situation look manageable by comparison.
What he needed was floors between them and him, not a reason to bring more people into this dungeon.
He moved into the descent passage.
The smoke column was still rising from the detonation site when he cleared the seventh floor's exit and stepped into the passage leading down.
The lead he had just created was measurable in floors rather than minutes, and the Adventurer group would need time to treat injuries, reassess their approach, and renegotiate the seventh floor's terrain before resuming.
He intended to use every meter of the advantage.