Rainbow crouched behind a boulder while the storm tore the world apart. She had left her painted galaxy house three days ago to chase a stolen brush. That brush could bind storms into colors and mend the balance of her land. Without it, the sky turned violent, like the wall of black wind now blocking her path. She could not go around it. She could not go back. Her pet pressed close against her side. The dragon's scales flashed rainbow and star-flecked, its wings splashed with wild color. It shivered each time thunder cracked. Rainbow held its neck and felt its heart pound against her palm. "We have to get through," she said. "The brush is out there. This storm is proof someone is using it wrong." The dragon huffed and shook its head. Rainbow understood. Flying into that wind would break its wings. She dug through her pack. Her fingers found the wand her grandmother had left her. Its surface swirled with painted galaxies and rainbow streaks. A crystal glowed at its tip. Rainbow had never used it against a storm this big. She only knew the old rule: calm, do not fight. She stood. The wind knocked her back a step. She planted her boots and raised the wand. "Stay low," she told the dragon. Rainbow closed her eyes and pictured the storm as spilled paint. She swept the wand in a slow circle. The crystal brightened. A thin ribbon of color streamed from the tip and touched the black wind. Nothing happened. The storm howled louder. Rainbow gritted her teeth and pushed harder, forcing the wand forward. That was the mistake. The crystal flared white. The wand kicked back and threw her flat on the wet ground. Pain shot up her arm. But the color held. Where the ribbon touched, the black wind thinned into a narrow passage. It glowed with soft blue and gold. The gap was small. It would not last. "Now!" Rainbow shouted. She scrambled onto the dragon's back. It lunged into the glowing passage. Wind clawed at them from both sides. The dragon beat its wings once, twice, and shot forward through the gap. They burst out the far side and crashed onto open ground. The storm sealed shut behind them with a boom. Rainbow rolled off the dragon and lay panting. She still gripped the wand. But its crystal had gone dark and dull. She tapped it. Nothing. The blast had drained it empty. She sat up and looked at the ruined tool in her hand. The storm was behind her now. The path ahead was open. But the wand was her only way to calm the next storm. And the brush that had made this one still lay somewhere ahead, in worse hands than hers. Rainbow climbed to her feet. She had passed the wall. Now she had to find whoever held the brush, before the next storm came and she had nothing left to stop it.

Beyond the sealed storm, the ground dropped into a drained storm-passage. Its walls were packed mud and cracked stone. Every footprint had washed away. Rainbow needed the thief’s trail before another storm found her. Her dragon lowered its nose and sniffed the floor. It sneezed black dust. Rainbow studied the walls instead. Thin streaks of blue, green, and red stained the cracks. They looked like brush marks, but rainwater had smeared them in every direction. A sharp knock came from ahead. Rainbow grabbed the dragon’s neck. A boy chipped ice from a wall with a short crystal blade. His coat flashed pale rainbow colors. He looked up, then lifted both hands. “Don’t step on the loose floor,” he said. “It drops into a flood channel.” Rainbow stopped inches from a dark split in the mud. Her chest tightened. “Who are you?” “IceeRainbowPrince.” He pointed to the colored streaks. “I came from the crystal castle. The storm tore pieces from the aurora shards. I’m collecting them before the next rain.” Rainbow showed him the drained wand. “Someone stole the brush that controls storms. I need their trail.” IceeRainbowPrince crouched beside a smear of red. He pressed an aurora shard against it. The shard caught the color. A thin line of light stretched across the passage floor, then bent toward a blocked side tunnel. “That mark is fresh,” he said. “The shard remembers where magic touched it.” Rainbow followed the line to the tunnel. A slab of fallen stone sealed most of the opening. Her dragon shoved its shoulder under the edge. Rainbow pushed beside it. IceeRainbowPrince wedged his blade into a crack. Together they lifted the slab enough to crawl through. On the other side, they found a narrow ledge above a deep channel. The light-line ran along the ledge, then stopped at a broken bridge. Across the gap sat a patch of black paint. A single bristle lay trapped in it. Rainbow’s stomach dropped. “The thief crossed here.” IceeRainbowPrince tossed an aurora shard over the gap. It struck the far wall and burst into a sheet of ice. The ice spread between both ledges. Rainbow tested it with one boot. It held. She crossed, took the bristle, and held it near the colored mark. The bristle pulled toward the passage exit. A clear trail now glowed in short, fading lines. Then thunder rolled above them. Water dripped from the ceiling. The new ice bridge cracked under the first hard drops. Rainbow pocketed the bristle. She had found the thief’s direction. But the rising flood had cut off the only way back.

The ice bridge snapped beneath the rising water. Rainbow caught the far ledge with both hands. Her dragon clawed at the wet stone beside her. IceeRainbowPrince grabbed her wrist, but the current dragged her boots toward the channel. Rainbow looked at her grandmother’s wand. The crystal stayed gray. “I can’t stop it.” “Then don’t stop it,” IceeRainbowPrince said. “Give us something to climb.” He pulled three aurora shards from his pouch. Rainbow understood. The shards could find magic left by the thief. The bristle in her pocket still held that magic. She pressed the bristle against the largest shard. A thin line of color flashed through the ice. It ran up the wall, past her fingers, and toward a crack above the flood. “Hold on,” Rainbow said. Her dragon hooked its claws into the crack. Rainbow shoved the glowing shard into another seam. IceeRainbowPrince pressed the other shards around it. Cold spread across the wall. Ice formed a rough ladder where the thief’s brush had scraped past. Rainbow climbed first. Water struck her legs and tore one hand free. IceeRainbowPrince caught her boot and shoved it back onto the next step. Her dragon climbed after her, scraping deep grooves into the frozen wall. They reached a narrow shelf just before the bridge vanished under brown water. Rainbow pulled IceeRainbowPrince over the edge. He lay flat for a breath, then sat up. A hard white light filled the tunnel ahead. Rainbow had never seen the crystal castle before. Its frosted towers stood beyond the shelf, close enough to touch. Rainbow colors moved inside the icy walls. The castle had a low arch open at its base. IceeRainbowPrincess stepped through the arch. She wore a crystal crown and held a cluster of aurora shards against her chest. Her eyes went to the glowing bristle in Rainbow’s hand. “You followed the brush trail here,” she said. Rainbow rose, dripping. “Did the thief come into the castle?” IceeRainbowPrincess studied the bristle. “No. The brush passed beneath it.” She pointed at the floodwater. “There is an old ice channel below. It leads out of the storm passage.” “The water will fill it,” Rainbow said. “It is already filling,” IceeRainbowPrincess replied. “But the trail is clear now.” Rainbow looked back at the drowned bridge. There was no way back. She slipped the bristle into her pocket and faced the open arch. “Show us the channel,” she said. IceeRainbowPrincess turned into the castle. Rainbow followed with IceeRainbowPrince and her dragon. Behind them, the flood swallowed the last ledge, sealing the broken bridge route for good.

IceeRainbowPrincess led them down a stair inside the castle. The steps ended at a low mouth of ice. Cold air pushed out of it. Rainbow looked in and saw the old channel. Its floor sloped down toward a black gap. Floodwater roared somewhere below the gap. The trail she needed ran straight across that floor. But the ice was wet and smooth as glass. "Step in there and you slide," Rainbow said. "Right into the water." "Then find a way to walk," said a new voice. A man stepped from a side arch. He wore a dark robe and a crystal crown. His eyes were bright blue and hard. IceeRainbowPrincess dropped her head at once. "Father," she said. This was the ruler of the castle, and he did not smile at the strangers dripping on his floor. "You brought the storm's mess into my halls," he told her. Then his eyes found the wand in Rainbow's hand. "That is no plain stick," the king said. He came closer. "It carries paint from the storm brush." Rainbow gripped the wand. Its surface swirled with color. "It's mine. My grandmother gave it to me." She looked back at the slick floor. An idea pulled at her. The bristle had made ice grow on the bridge wall. Maybe the wand could do more. "I need to cross," Rainbow said. "The floor's too slick. Will you help, or watch me fall?" The king studied her. "Show me it still holds power." Rainbow knelt at the channel's mouth. She pressed the bristle against the wand's tip. Color leaked into the crystal. She touched the wand to the ice floor and dragged it forward. A rough ridge rose under the point. The smooth surface cracked into gripping steps. Her dragon set one claw on the first ridge. It held. Rainbow pushed the wand further, and the ridged path grew toward the far side. "Go," she told IceeRainbowPrince. He crossed on the new footing, arms out for balance. Rainbow followed, dragging the wand as she went. Below her, the black gap breathed cold water. She did not look at it. She watched the ridges form under the tip and stepped on each one. Her dragon reached the far ledge and turned to wait. Rainbow took the last step across. Then the wand went dull in her hand. The color drained out. The final stretch of ice never roughened. IceeRainbowPrincess still stood on the castle side, cut off. "The crystal's spent," Rainbow called. The king watched his daughter across the gap. His face changed. "You took my child's road and left her behind," he said. He raised his own crown crystal. "Now you will bring her through, or I will freeze your trail shut for good." Rainbow stood on the far side, dragon beside her, the trail open ahead. But an angry king held the only path back.