Whenever Grass-Barrens becomes tapped, it deals 1 damage to you.
: Add to your mana pool. Grass-Barrens doesn't untap during your next untap step.
, Sacrifice Grass-Barrens: Add to your mana pool.
: Add 
to your mana pool. Grass-Barrens doesn't untap during your next untap step., Sacrifice Grass-Barrens: Add 
to your mana pool.
