Take Gogo, a character that has the X-Zone spell, and a character with the Vanish spell. Make sure Gogo has the Magic skill equipped, and not Runic (it is useless in this battle). Cast Vanish on the two creatures, and then use X-Zone. They will die and you will win the battle. Your rewards are the Aura, Cyan, and the Alexander Esper. It is useful in battle against creatures such as Doomgaze, which is weak against Pearl.