Dark Creator Sword

The Dark Creator Sword is a replica of the Sword of the Creator, but it is darker in color and has two crest stones in it.

Past here are spoilers

The Dark Creator Sword is only wielded by Nemesis in the final mission of the Golden Deer Route. It has slightly higher might than the Sublime Creator Sword, but a lower accuracy. To anyone who has the Crest of Flames they gain access to Heaven's Fall (Which can really only be used by Nemesis). This weapon is unobtainable as well as the other Dark Hero Relics.