Breachmaker

Devoid (This card has no color.)
Eminence - At the end of your turn, you may
exile the top 2 cards of your library, for each
colorless card exiled this way, you may put a
breach counter on one of those cards.
Once each turn, when an effect you control
puts a card you own into exile, you may play
a card with a breach counter on it without
paying it's mana cost.