Afiya Grove enters with three +1/+1 counters on it.
At the beginning of your upkeep, move a +1/+1 counter from Afiya Grove onto target creature.
When Afiya Grove has no +1/+1 counters on it, sacrifice it.
If there are any creatures on the battlefield, even if they are just your opponent’s, you must put a +1/+1 on one of them. If there are no creatures on the battlefield, then no counter is removed from this card.