**Chapter 10: The Tempest's Fury**

The calm that had settled over the metal city after the battle was short-lived, as Kuvira and Opal stood panting, their eyes locked in a silent challenge. The air was heavy with anticipation, the very atmosphere seeming to vibrate with the promise of another clash. Kuvira's gaze narrowed, her eyes flashing with a fierce determination as she summoned a burst of earth energy that sent a nearby metal beam shuddering to the ground. Opal's eyes widened, her face set in a fierce grin as she responded with a whirlwind of air that sent Kuvira stumbling back. The earthbender's vision blurred, her ears ringing from the deafening roar of the tempest as Opal's airbending buffeted her with wave after wave of turbulent air. The battle raged on, the two women exchanging blow for blow as the metal city around them began to crumble. Steel beams twisted and buckled, their supports shattering like brittle glass as Kuvira's earthbending and Opal's airbending clashed in a maelstrom of elemental fury. As the fight wore on, Kuvira began to feel a creeping sense of unease. Opal's movements were becoming more and more fluid, as if she was no longer just bending the air – she was becoming one with it. The airbender's hair was whipping back and forth, her eyes flashing with an inner light as she unleashed a torrent of air that sent Kuvira stumbling back. Kuvira gritted her teeth, her fingers flexing as she summoned a massive wall of earth that sent Opal crashing to the ground. But the airbender was relentless, her body battered and bruised as she struggled to get back to her feet. As Kuvira approached her, Opal's eyes flashed with a fierce determination. With a cry of rage, she summoned a blast of air that sent Kuvira flying across the room. The earthbender landed hard, her body battered and bruised as she struggled to get back to her feet. But as she looked up, Kuvira saw something that made her blood run cold. Opal was no longer alone. Standing behind her, its eyes glowing with an otherworldly energy, was a massive storm elemental – a creature born of the very air itself. The elemental's presence was like a magnet, drawing Kuvira's gaze inexorably towards it. She felt a shiver run down her spine as she realized that Opal had made a pact with a being from the Spirit World – a being that could grant her unimaginable power. Kuvira's eyes locked onto Opal, her face set in a fierce scowl. "You've gone too far, Opal," she growled, her voice dripping with menace. "You think you can defeat me with the help of a Spirit World creature? I won't let you." Opal's eyes flashed with triumph, her face set in a fierce grin. "You're no match for me, Kuvira," she sneered, her voice dripping with contempt. "The storm elemental will crush you, and I will reign supreme." As Kuvira charged forward, the storm elemental looming large behind Opal, the metal city trembled and groaned around them, its defenses buckling and twisting under the strain of their bending energies. The battle between Kuvira and Opal was about to take a dramatic turn, one that would change the fate of the metal city forever.