Nix nullifies an enemy's magical power, making him unable to cast spells - a wizard's worst nightmare. Be aware, however, that such a powerful spell requires its caster to have great magical ability. Should two wizards attempt to Nix each other during battle, it is said that fortune favors the one with the purest heart.
Nix is a spell that allows the caster to render a rival wizard incapable of casting spells. Oliver obtains this spell after defeating the Zodiarchy, along with Ashes of Resurrection. It is, however, unusable.