The Long Dark Night

The Long Dark Night can not leave play.
If it would leave play, instead it does not.
Whenever a creature or creature token dies, put a
1/1 black zombie token with a +1/+1 counter on
it into play. Whenever a zombie token with a
+1/+1 counter on it would die, put it back into
play with an additional +1/+1 counter on it.
"Monsters roam the land during the long dark night
and only the light keeps them away. So lock your
doors and stay at home."