Svogthos, the Restless Tomb
Card Type: Land
Card Text: : Add to your mana pool.
: Until end of turn, Svogthos, the Restless Tomb becomes a black and green Plant Zombie creature with "This creature's power and toughness are each equal to the number of creature cards in your graveyard." It's still a land.
Artist: Martina Pilcerova