Although it was exclusive to Shurelia in its original game, this item is also featured in Cross Edge as one of the three possible ultimate armors for her, Aurica and Misha. As with all the ultimate items, it's extremely hard to synthesize, and the unique ingredient its synthesis requires is also taken directly from Ar tonelico: Melody of Elemia: it's the DH Altered Grathnode Disc, which was renamed to DH Grathnode Disc in there. However, that's the only ingredient both games have in common: the other ones are completely different.