built and soulbound to steel alone, the crystal wing takes up the energy and stores it in the gem of the sword, evenly discharging the energy through the blade, it uses the crystal core along the blade to harden the metal and aid in cutting through whatever stands in it's path.

the stone will glow in his signature color. If that light isnt shining, it could be an ill sign for the celestial warrior....unless that is of course, he intended to cut off his power from the blade