Blue Moon

If this card entered play from exile, when it enters the battlefield put 2 +1/+1 counters on all wolfs and werewolfs you control.
When this card enters play, put two phase counters on it. At the beginning of your upkeep, remove one of them.
Whenever there would be no phase counters on this card, exile it with two time counters. At the beginning of your upkeep, remove one of them. Whenever there are no time counters on this card, put it into play.