Nar-Arach, Herald of Carnage

Incarnation {2}{p/w}{p/w} (If you cast this card for its Incarnation cost, it's an Aura spell with enchant
creature. It becomes a creature again if it's not
attached to a creature.)
At the beginning of your upkeep, you lose 1 life.
Nar-Arach, Herald of Carnage, and enchanted creature each get +X/+X, where X is the
number of creature cards in all graveyards
and have menace.