Nixilis, Ascended Demon

Flying, Menace, Deity
(This creature gains indestructible as long as you
control 4 or more other creatures that share one or
more creature types with it.)
Whenever an Demon enters the battlefield,
put a -1/-1 counter on each creature you don't
control.
Whenever a creature with a -1/-1 dies, you gain
2 life and draw a card.