The DX Arc Cube Ultraman Arc Luna Armor Cube is used by Ultraman Arc to transform into Ultraman Arc Luna Armor. To transform, the user presses the button on the Arc Cube and sets it to the DX Arc Ariser (sold separately), thus the Arc Cube will light up thanks to said transformation item and the sounds of both items will interact. Afterwards, the user twists the Arc Ariser horizontally and vertically so that the diamond pattern in front will align, thus activating the Armor Change sound to become Ultraman Arc Luna Armor!
This item can also be inserted to the DX Arc Eye Sword (sold separately) and after you press the button on the Arc Cube and insert it to said sword, the sounds of both sides will interact and the blade will glow light blue and blue. By pressing the trigger button continuously, the "Luna Sword Crescent" finisher will be activated. Lastly, the Arc Cube in itself can play five kinds of sounds, namely: dialogue, Armor Change sound, shout, beam attack sound, and Color Timer sound. This item cost 1,650 yen, and is set for an August 24th release.