Zyra, Rise of the Thorns

When Zyra enters the battlefield
Create two 0/1 Plant Creature Tokens
with Defender.
Every upkeep create two 0/1 Plant Creature
Tokens with Defender.
{t}{x}: Sacrifice {x} Plants
Create {x} 2/2 Plant Tokens with Reach or Create {x} 2/2 Plant Tokens with Double Strike
What lurks beneath the soil? - Zyra.