The tunnel ended at a towering bone gate old, cracked, but humming with a faint pulse. Beyond it, muted sunlight filtered through slats of decayed stone.The air smelled less like marrow and more like dust and cold wind. Seren pressed close to Elias. “We’re near the surface. I can feel it.”Caedia nodded. “We’re beneath the palace outskirts. The gate leads into the disused lower chambers.” Sylare shivered, clutching Elias’s spare cloak. “The Alchemists use those halls. If they see us”“They won’t,” Elias said. “Not if we’re fast.”He placed his hand against the gate. The bone-song inside him vibrated, responding to something faint and waiting. A lock. A pattern. An ancient seal.Caedia stepped beside him. “This gate was built by the Old Keepers. It will answer only to a marrow-bound lineage.”Seren blinked. “In English?”Caedia pointed at Elias. “It will open for him.”Elias inhaled. “Then let’s open it.” His resonance surged calm, controlled, for the first time that day. The bone gat

The stairwell breathed cold air up from the palace undercorridors like the exhale of a buried beast. Elias, Seren, Caedia, and the weakened Sylare emerged from the last catacomb passage and finally stepped into the dim stone hall that led directly beneath the royal wings.Seren pressed against Elias’s side, staring at the vaulted corridor ahead. “Are you sure this is the right way?”Caedia raised her head, listening to vibrations none of them could hear. “Yes. The resonance trail from Sylare’s corruption ends here. Lyra was taken upward.”Elias tightened his jaw. “Then that’s where we go.”Sylare swallowed, clutching Seren’s sleeve. “The Alchemists… they use the east halls. The restricted ones. I heard them say something about the Marrow Gate.”Seren frowned. “What in the world is the Marrow Gate?”Caedia stiffened. “A door that should never open.” Elias looked between them. “Explain.”Caedia’s voice dropped. “The Bonekeepers built three forbidden seals deep under this palace. The las

The underground passage trembled as if the bones themselves were breathing. Dust fell from the ceiling in soft cascades, and a cold draft traveled through the corridor like a warning.Seren gripped Elias’s arm. “Something’s moving behind us. I hear it.” Caedia didn’t turn. Her blind eyes were locked ahead, glowing faintly. “No. Not behind. Below.”Elias tensed. “Below?”“Yes,” Caedia whispered. “There is something beneath the floor. Tracking your Echo.”Seren’s voice dropped to a terrified hiss. “What kind of something?” Caedia inhaled slowly. “A Mawcaller.”Seren blanched. “A what?”“A creature born from the bones of beasts,” Caedia murmured. “And used to hunt Echo-bearers.” Elias’s jaw clenched. “They bred it for me.”“No,” Caedia said calmly. “They bred it for anyone like you. But you are the first in centuries.”Seren swallowed. “Meaning we are the first meal it’s smelled in centuries?” A crack pulsed beneath their feet. Elias grabbed Seren’s wrist. “Move. Now.”They sprinted down

The hidden chamber beneath the palace throne room was colder than any tunnel Elias had walked through. Not physically cold bone cold, the kind that seeped into thoughts rather than flesh.The chamber’s entrance sealed behind them with a soft, ominous thrum. Seren flinched. “I don’t like that sound.” Caedia gripped her bone cane tighter.“It means we’re entering a resonance ward. Someone powerful set it.” Sylare shivered. “The Alchemists used this place to test rituals. Not even the nobles know it exists.”Elias scanned the long, The hall led into a wide circular chamber ringed with cracked marble pillars. Old Bonekeeper murals lined the walls painted stories of oath-takers, warriors, and kings long dead. But the floor…The floor was carved with spiraling runes still glowing faintly blue. Seren grabbed Elias’s sleeve. “Those runes… they look like the corruption marks.”Caedia nodded grimly. “Because they are. This is a ritual array.” Sylare shook harder. “This is where they meant to ki

The descent ended abruptly. The bone pathway flattened into a vast, circular chamber far wider than anything they had crossed. Ribs arched overhead like an enormous cage suspended in eternal darkness.The air hummed with a low, ancient vibration. Seren stepped closer to Elias, whispering, “This place feels… angry.”Caedia extended one hand cautiously, feeling the vibration in the air. “It should. This chamber was forbidden even to Bonekeepers.”Elias scanned the runes etched into the floor spiraling, intersecting, pulsing faintly. “What is this place?” he asked.Caedia inhaled slowly. “A resonance well. The oldest in the undercity.”Seren frowned. “Meaning…?”“It amplifies all marrow frequencies,” Caedia replied. “Living or dead.”Elias stiffened. “Including mine.”“Especially yours.”Seren’s grip tightened on Elias’s sleeve. “Okay, I hate this plan already.”“It isn’t a plan,” Caedia corrected. “It’s a path. The only one left that leads upward.”Before Elias could respond, a faint, t