Nighthowler C15/129

Set: Commander 2015
Collector Code: C15/129
Name: Nighthowler
Type: Enchantment Creature — Horror
Oracle text: Bestow {2}{B}{B} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) This creature and enchanted creature each get +X/+X, where X is the number of creature cards in all graveyards.
Rarity: Rare