Hollowing Tormentor

Flying (This creature can't be blocked except by creatures with flying and/or reach.)
Ethereal - When this creature becomes the target of a spell or ability, if it doesn't have a -1/-1 counter on it, put a -1/-1 counter on it and draw a card.
{2}{b}, Discard a card: Return Hollowing Tormentor to the battlefield tapped.