Atraxa, Corruption Clarion

Compleated ({g/w} can be paid with {g}, {w}, or 2 life.
If life was paid, this creature enters the battlefield with
two -1/-1 counters on it.)
Whenever you put one or more -1/-1 counters on
a creature, target creature gains flying, vigilance, deathtouch, and lifelink until end of turn.
Whenever you pay life, for each kind of counter
on target permanent, put another counter of that
kind on it or remove one from it.