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 to a creature.)
Nighthowler and enchanted creature each get +X/+X, where X is the number of creature cards in all graveyards.
![Nighthowler [Theros] | Jack's On Queen](http://jacksonqueen.ca/cdn/shop/products/2527a490-6c56-41ba-949c-c78905a128ba.jpg?v=1569470792)
