Nurturing Warforged

Nurturing Warforged enters the battlefield
with 4 +1/+1 counters on it.
Whenever a permanent you control becomes
the target of a spell an opponent controls,
counter that spell and remove a +1/+1 counter
from Nurturing Warforged.
When Nurturing Warforged dies, put 3 +1/+1
counters on each creature you control.