You can get many rewards from these boxes. Every item that was previously released in a treasure box, back to sterling forward, is now reobtainable in these or the Silver Dust kiosk. Even the Ghost Ghost, which eluded me. They will feature a new Armor set, "-Armor Piece- of Triumph", which will have an ornament slot. They will also feature 2 ships, and 3 shaders. 1 seperate shader will be obtainable similar to the Dawning armor, requiring you to collect all 4 pieces of the armor. I didn't notice a class item, but I may be wrong. You can get the SRL emblems as well now. I'm not sure if these are box drops, but ornaments for Touch of Malice, Dragon's Breath, SUROS Regime, No Land Beyond, Vex Mythoclast, and the Necrochasm, which confirms the gun's return. If there is anything I missed, let me know and I'll update the list