The training room buzzed with raw energy, its vast steel walls pulsing with runes that glowed like embers in the midday light streaming through high windows. Jin stood in a sparring ring, Muramasa's cracked black blade humming in his hand, its weight a familiar comfort as he deflected a metallic sphere whizzing past his head. Joon, across from him, grinned, his three silver spheres orbiting him like tiny moons, crackling with faint lightning. The air crackled too, charged with the intensity of Jin's team—Seul, Chul, Echo, Yujin, Areum, Hanuel, Jisoo—and Ryu's crew, all scattered across the sprawling facility, their shouts and clangs blending into a chaotic symphony. Sparring mats thumped, target drones whirred, and obstacle courses groaned under the weight of System-enhanced skills. Jin's heart pounded, not from exhaustion but from the thrill of pushing his limits alongside his allies, every move honing them for the Crown quest's unseen battles.