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 player or planeswalker, put a +1/+1 counter on that creature.
-2
Create a 1/1 black Assassin creature token with deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) and "Whenever this token deals damage to a planeswalker, destroy that planeswalker."