Druid of Evergrowth

Supremacy 3 (When you cast this creature, you may pay an additional {3}. If you do, this creature enters the battlefield with three +1/+1 counters on it.)
Reach, trample
Druid of Evergrowth enters the battlefield with a +1/+1 counter on it.
When Druid of Evergrowth attacks, double the number of +1/+1 counters on it.