Mind Defiler

When Mind Defiler enters the battlefield
exile the top three cards of opponents library,
You may play cards exiled by Mind Defiler for as
long as they remained exiled, And you may spend
mana as though it were mana of any color to cast spells this way
{2}{c}{c} Exile the top card of target opponents
library
{1}{c} exile target card in any graveyard