I think a good idea for a wand is my ideas are a small ball of light that floats in your wizards hand:
Life:A small green light Death:Grey Fire:Red Myth:yellow Ice:blue Storm:purple Balance:A small sandy colored one?
and when you go to attack your wizard lifts up the light to attack like life would create a vine to attack death would take a small soul looking thing out like the wraith and etc.
