Obviously it has patterns of the Celestial Towers, and looks like the Celestial Sigil. I guess it shall be used as a crafting material, perhaps for upgrades for the current celestial gear. I guess this is mainly for the weapons. I really want the "useless" weapons of the celestials to have more use. You see, pretty much only 1 weapon of each class needs crafting and the other is kicked to the sideline. Phantasm > Vortex Beater, Solar Eruption > Daybreak, Nebula Blaze > Nebula Arcanum, Stardust Dragon Staff > Stardust Cell Staff... These are pretty much the crystal clear choices. By giving advantages and fancy effects to the more ordinary kind of celestial weapons, it will make the choice based more on personal taste rather than obvious advantages. Phantasm has a nice mechanic of "phantom arrows", unique to it, and very creative. Vortex Beater has just a functioning grenade launcher. Solar Eruption is one heck of a versatile weapon, opposing to daybreak which is pretty much mandatory to single targets and specific situations. Nebula weapons clearly are both a little underwhelming, but the high damage of Nebula Blaze and it's relatively low(at least when comparated to it's counterpart) mana cost makes it a better choice. Stardust Dragon is a must have even for non summoners, while Cell is only at it's apex when using a summoner class build. So yes, giving these some upgrades would be amazing, but if you wish to make upgrades for the pairs of celestial weapons, that's fine as well. (Wall of Text ends here)