Reusable -1/-1 giver? A potential token devastator? A really big annoyance? This card is all of those things. I've never seen this card used outside of Limited, but I can definitely see the potential of this card. Running multiple of these can be pretty devastating. However, the major problem with this card is that is has to come back from the graveyard if it can. That means that it'll attach itself to one of your creatures if there are no other creatures around.
Pros: Reusable -1/-1
Cons: Has to come back even if it attaches to one of your creatures