Tess, Prepared for War

Tribute 2 (As this creature enters the battlefield, an opponent of your choice may put two +1/+1 counters on it.)

Persist
If Tess, Prepared for War's tribute cost was not paid, exile all creatures from all graveyards and create that many X/X black and green Plant Zombie creature tokens with the same base power and toughness of each exiled creature.