The chain's vow, Observation Haki's reinforcement

The safe house's wooden door closed softly, shutting out the clamor and undercurrents beneath Yorknew City's neon lights. A yellowish bulb hung overhead, its dim light pressing the three figures' shadows onto the old wooden tabletop-the map of Yorknew City spread across it was densely marked in red, every stroke concealing the bloodshed to come. Kurapika closed the window and drew the heavy curtains, then lightly tapped the auction building on the map. The scarlet in his eyes had yet to fade completely, but he forced down the hatred churning in his voice. "The Gnostic Family controls the core security for this underground auction. I infiltrated them as a 'contract bodyguard' so I could pinpoint the location of the Kurta Clan's Scarlet Eyes the moment the Phantom Troupe makes its move." He raised his hand, and a slender chain slipped from his cuff. Its links gleamed with a cold metallic sheen, and the ring at its end was engraved with intricate incantations-it was his Conjuration Nen Ability, Judgment Chain, a blade of vengeance created specifically for the Phantom Troupe. "My chain can precisely lock onto the Nen fluctuations of Troupe members, but if I leave Yorknew City or use it on anyone outside the Troupe, it will trigger my Vows and Limitations. At best, my Nen will collapse. At worst..." He did not finish, but Lin Ye and Lina both understood: it was a shackle of vengeance bound to his life. "You shouldn't stake all your Nen on revenge." Lin Ye leaned forward and ran his fingertips over the chain, clearly sensing the extreme obsession contained within it. "The chain is your weapon, not your prison. If hatred consumes you, you'll lose yourself even if you get your revenge." Kurapika's fingers tightened slightly, and the chain gave a faint clink.