Nighthowler

Enchantment Creature — Horror • Mana cost: {1}{B}{B} • Commander Legends: Battle for Baldur's Gate • Rare

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.

Illustrated by Nils Hamm.