Infierno, The Arisen

As long as Infierno is in the command zone, creatures opponents cast enter the battlefield
with a -1/-1 counter on them.
When Infierno, The Arisen enters the battlefield, destroy each creature with a -1/-1 counter on it,
you gain 2 life for each creature destroyed by this.
{2}{b}{r}, Put Infierno from the command zone
onto the battlefield.