Oracle Text

1B, T, Discard a card: Create a 2/2 black Zombie creature token.

Tap three untapped Zombies you control: You draw a card and you lose 1 life.

Card Rulings

7/13/2016 You can tap any three untapped Zombies you control, including ones you haven’t controlled continuously since the beginning of your most recent turn, to pay the cost of Cryptbreaker’s second activated ability. This includes Cryptbreaker itself.