Atrocious Wingmare

Flying

When this creature enters, you may sacrifice a
non-Eldrazi creature. If you do, lessen. (Choose any number of permanents and/or players, then remove a counter from each of them.)

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)