Gelatinous Goo

As an additional cost to cast this spell, you may pay
3 life. If you do, Gelatinous Goo enters with a +1/+1 counter on it.

Whenever Gelatinous Goo deals combat damage to
an opponent, put a +1/+1 counter on it.

Whenever Gelatinous Goo would take damage, remove that many +1/+1 counters from it instead.