Necromant

{b}{b}{b}{10}: This ability costs {1} less to activate for each +1/+1 counter on this creature. Return target creature card from the graveyard to play tapped. Put a +1/+1 counter on this creature.
{b}: remove all +1/+1 counters from this creature.
When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.