Abyss Watchers

First strike
When Abyss Watchers dies, if it had no +1/+1 counters on it, create two 1/1 red Zombie Knight creature tokens with first strike.
At the beginning of your upkeep, if you don't
control a Zombie Knight creature, return Abyss
Watchers from your graveyard to the battlefield
with two +1/+1 counters on it.