Enchant Forest or Plains
Whenever enchanted land becomes tapped, its controller loses 2 life.
Enchant creature without flying
When Roots enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
As Roots of Life enters the battlefield, choose Island or Swamp.
Whenever a land of the chosen type an opponent controls becomes tapped, you gain 1 life.
Defender
Put a -0/-1 counter on Wall of Roots: Add to your mana pool. Activate this ability only once each turn.