reverse and betray

choose a spell on the stack.
if it's white, counter it.
if it's blue, you may change it's targets.
if it's black, it's controller loses life equal to twice
it's converted mana cost.
if it's red, flip a coin. if you win, destroy a
creature. if you lose, sacrafice a crature.
if it's green, create a 3/3 vampire creature token
with flying.