Agent of Ob Nixilis

Whenever a non-token creature dies, scry 1. Put a
counter on this card.
At the beginning of your end step, if this card
has 20 or more counters on it, create a 5/5
black demon token with flying. You lose 2 life.
Demons tokens you control get +1/+1.
"Conquering my first plane wasn't easy, it came with
a cost...as all glorious things do."