Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Whenever a creature you control with
deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) attacks, each opponent loses 1 life and you gain 1 life.
Whenever a creature you control with
deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) deals damage to a planeswalker, destroy that planeswalker.