Gravecrawler | Magic: The Gathering
Formats Gravecrawler is Legal in
Official Oracle Text for Gravecrawler
You may cast Gravecrawler from your graveyard as long as you control a Zombie.
Official Rulings for Gravecrawler
1/22/2011 : Once you've cast Gravecrawler and it's on the stack, it doesn't matter if you lose control of the other Zombie.