The training room thrummed with life, a sprawling arena of reinforced steel and glowing runes that pulsed like heartbeats. Jin stood near the center, Muramasa's cracked black blade heavy in his hand, its faint hum a steady anchor against the buzz of anticipation. The air crackled, charged from the echo of his duel with Ryu, and the room was alive with movement—Jin's team on one side, Ryu's on the other, scattered across sparring mats, target drones, and obstacle courses. Seul was already airborne, testing her force manipulation, while Chul's kinetic bursts rattled a nearby dummy. Echo's resonance vibrated through a drone, Joon's lightning sparked in controlled flashes, and Ryu's metal form gleamed as he sparred with his crew. The noise was a chaotic symphony—grunts, shouts, and the clatter of equipment—but Jin's focus shifted when a shadow stepped into the central ring.