Nasus, Lost Son of the Desert

Lifelink, Wither (This deals damage to creatures
in the form of -1/-1 counters.)
{t}: Nasus, Lost Son of the Desert deals 1 damage
to target creature.
If an opponents creature with -1/-1 counter on it
dies, put a +1+1 counter on Nasus, Lost Son of
the Sands.