The Way Of The Ninja

Flying, Deathtouch
Whenever you attack, choose an attacking
creature, that creature gains deathtouch, flying
and menace.
If you dealt combat damage to a player this turn
{4} and discard a card - If you do, target tapped
creature gets {x} +1/+1 counters on it, where {x} is the amount of damage you dealt to
a player this turn.