Capillary Wurm

Capillary Wurm enters the battlefield with
two +1/+1 counters on it.
At the end of your turn, remove a +1/+1
counter from Capillary Wurm.
When Capillary Wurm dies, it deals damage
equal to it's toughness to all non-black creatures
{b}{b}: Put a +1/+1 counter on Capillary Wurm