Treeborn Maiden

Natureborn. (When this creature enters the battlefield, put three +1+1 counters on target creature).
When Treeborn Maiden enters the battlefield, if you control four or more plants, put three +1+1 counters on target creature. If not, sacrifice a creature with converted mana cost of three or less.
{g/w}: Put a copy of target creature in your graveyard onto the battlefield.