Fractured Identity

Convoke (Each creature you tap while playing this spell reduces its cost by {1} or by one mana
of that creature's color)
1-8= Exile target nonplaneswalker permanent.
9-13= Same as above except each player other
than it's controller creates a token copy of it.
14-18= Same as above except only you copy it.
19-20= Same as above except you make 2 copys.