Fallen Archangel

If Fallen Archangel's toughness would be
reduced to 0 or less due to -1/-1 counters, Fallen
Archangel's toughness is 1 instead.
Flying
Whenever a white creature dies, put a -1/-1
counter on Fallen Archangel.
White creatures get -1/-1 for each -1/-1 counter
on Fallen Archangel.