In <p>In addition to the items previously mentioned (Nail Case, Lion's Heart (<strong>Music Box</strong>, <strong>Nail Case</strong>, <strong>Lion's Heart</strong> and possibly Tin Key), the Golem Wrench, Percht Skull <strong>Tin Key</strong>), the <strong>Golem Wrench</strong>, <strong>Percht Skull</strong> (which you turn in), the two Tendril Lanterns <strong>Tendril Lanterns</strong> can't break. I also believe Library ticket and Regalia <strong>Library ticket</strong> and <strong>Regalia of Suon Suon</strong> falls into this category, but I need someone to confirm.confirm.</p>