All Consuming Ooze

As you cast All Consuming Ooze you may sacrifice any number of creatures, All Consuming Ooze enters the battlefield with a number of +1/+1 counters on it equal to the number of creatures sacrificed.
When All Consuming Ooze enters the battlefield target opponent sacrifices an amount of permanents equal to the amount of +1/+1 counters on All Consuming Ooze