Cyndi Cylendar bolted the iron door behind her and listened for footsteps on the stair. None came. She let out a breath and turned back to the room she had built in secret under the black towers, a hollow carved into rock her sister Bella could not see from the crystal palace. Bella ruled the enchanted realms and had told the whole court that no sister would follow her on the throne. Cyndi meant to prove her wrong. She crossed to the ritual table at the center of the room. Four spell books sat stacked at one corner, their leather split, their clasps stained. She opened the top one to a page she had marked with a strip of black cloth. The spell asked for a spoken name and a drop of blood. She pricked her thumb on the clasp and spoke the words. The candle on the table bent sideways, then straightened. Nothing else moved. Weeks of work, and she still could not lift a stone across the room. She knew why. Her sorcery was not ready. If she moved on Bella now, the court would catch her before the spell finished, and treason meant the block. She needed more nights here, more pages, more blood. She needed the fortress to stay hidden. A soft knock hit the outer door. Cyndi froze. The knock came again, patient, three taps. "Cindy. It's me." Heather. Cyndi shut the book and pushed the stack behind the table. She crossed the room, unbolted the door, and opened it a hand's width. Her younger sister stood on the stone step in a pale dress, pink hair loose, blue eyes tired. Heather looked past Cyndi's shoulder at the candle, the table, the books. "You shouldn't be here," Cyndi said. "I followed you last night too," Heather said. "I saw the door. I didn't tell Bella." "Why not?" "Because once I tell her, I can't untell her." Heather folded her arms. "I came to ask you to stop. Burn the books. Come home." Cyndi thought about the spell that had failed, the weeks she still needed, the sister on the throne who had shut the door on her. She thought about what Heather could say at breakfast tomorrow and what would happen by dusk. She stepped back and opened the door wider. "Come in," Cyndi said. "Let me show you what I'm doing. Then decide." Heather hesitated on the step. Cyndi kept her hand on the door and her face soft. She had one page in the second book that did not need strength, only trust and a shared cup. It would hold Heather's tongue for a season. Long enough. Heather stepped inside. Cyndi bolted the door behind her and reached for the kettle on the shelf.

The kettle never boiled. Cyndi set it back on the shelf and turned to Heather, who stood by the ritual table with her fingers on the split spine of a spell book. Before Cyndi could pour the cup and speak the trust spell, a bell rang far above them, three short strikes. Heather's head lifted. Cyndi knew the sound. A palace attendant was on the stair corridor, calling for Heather by name. "They tracked me," Heather said. "I told the guard I was walking the west field. He didn't believe me." She wiped her palms on her dress. "The dog is with him. It follows my scent to the door and Bella knows this room exists by supper." Cyndi crossed to the wall and pressed her hand to the packed earth behind the table. She had been feeding the ground for weeks, pushing her magic out through the dirt in a slow black stain that already reached the palace foundations. She pulled a thread of it back now, up through her wrist. The floor warmed. A small mound of scorched dirt rose beside her boot, veined with red like a coal cracked open. She spoke a name into it. The mound pulsed once. Above them, in the corridor, the guard dog's bark twisted into a whine and then stopped. Cyndi felt the animal drop. She felt the attendant stumble and forget which turn he had taken. She held the spell until his footsteps moved the wrong way down the stair. Heather watched the mound cool. "You killed the dog." "I turned him around. The dog will wake." Cyndi lied about the dog and knew Heather heard it. She stepped between Heather and the door. "You can't leave. If you walk up there now, he sees you coming from this hall and Bella has the map by morning." She lifted the second book off the stack. "Stay a season. One cup. You keep your tongue, I keep my work. After that you go home to your children and I never ask you again." Heather looked at the door, then at the mound, then at her sister. "A season," she said. "And when Bella asks me where you are, I say I don't know, and the words come out true." She took the cup Cyndi poured and drank. Cyndi drank after her and spoke the binding. Heather's shoulders dropped an inch, as if a small weight had been set down in a room she could not see. She sat on the stool by the table. She would not climb the stair until Cyndi opened the door. Cyndi bolted it and turned back to her books. The dirt under the palace was almost ready. Heather was inside the trap, and the attendant was walking the wrong way, and Bella did not yet know either thing.

The east court still smelled of scorched stone when Cyndi rode hard for Blackspire. Her attack had failed. Bella had faced her down, and her own daughter Goldie had stood against her. Worse, Cyndi felt the truth spell twist in her chest. Through the same thread that bound Heather's silence, Goldie had sensed where Cyndi kept her sister locked away. If Goldie was truly her enemy, Bella now knew Heather sat behind these walls. Cyndi did not know if her daughter had betrayed her or protected her. She found Heather in the high chamber, seated among the pile of cracked spell books she refused to touch. Heather was Cyndi's youngest sister, gentle where Cyndi was sharp, a mother of three who had never wanted any of this. She had drunk the trust cup to buy Cyndi one season of silence. Now she looked up, calm as still water. "You lost," Heather said. "I felt it. The court held." She smoothed her pale dress. "You look surprised your own child chose the other side." "Did she tell Bella you were here?" Cyndi demanded. "I don't know Bella's mind. I know yours." Heather stood. "Goldie isn't your weapon, Cyndi. She wants the hours and nothing else. You bent time against her tower and she still didn't sell you out. That should tell you something." Cyndi gripped the top book. Its jagged clasp bit her palm. "Then she is not my ally either." "No," Heather said. "She's her own. You never learned the difference." The words landed harder than any spell. Cyndi had spent weeks certain Goldie was either a tool or a traitor. Now she understood the truth. Her daughter had refused to be either. That refusal answered the question and broke it at once. Cyndi had no rival heir to fight and no daughter to command. She was alone. Then the floor shook. A horn sounded below the walls, and Cyndi heard hooves on the stone road. She crossed to the arrow slit. Riders massed at the gate, silver banners bright against the dark towers. At their head rode Bella, white hair loose, the crystal shard glowing in her hands. "They came fast," Heather said. She did not sound afraid. "Goldie rides with them. Silver too." Cyndi's heart dropped. The truth spell had leaked the fortress to Goldie, and Goldie had carried it straight to Bella. The question of ally or threat was settled. Her daughter had chosen the realm over her. "Let me go down to them," Heather said quietly. "Before this becomes a siege. You still have a season of my silence. You don't have to lose Goldie too." Cyndi turned from the window. Below, Bella raised the shard, and the gate began to glow. The choice was no longer whether to hold Heather. It was whether to fight her own family at her own gate, or flee before they broke it open.