Eight Magic Color Selection Crystal (八色魔選晶, Hasshiki Masen Shou) is a Magic Tool used at Magnostadt Academy for classifying the eight different kinds of Magicians and Rukh in a person. The kinds of rukh are: * 1st type: rukh that manipulate flames * 2nd type: rukh that manipulate water * 3rd type: rukh that manipulate light * 4th type: rukh that manipulate lightning * 5th type: rukh that manipulate wind * 6th type: rukh that manipulate sound * 7th type: rukh that manipulate power * 8th type: rukh that manipulate life