Ember Swallower [Theros Prerelease Promos]

Set: Theros Prerelease Promos Type: Creature — Elemental Rarity: Rare Cost: {2}{R}{R} {5}{R}{R}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)When Ember Swallower becomes monstrous, each player sacrifices three lands.