Leliyel, the First Night

Champion one or more black permanents.
If the devotion to black of permanents championed by Leliyel, the First Night is greater than or equal to X, where X is the number listed below, Leliyel has the following text:
-2: Deathtouch, lifelink.
-4: Creatures you control have menace.
-6: At the beginning of your upkeep, create an
X/X black Nightmare creature token. You lose X life.