Atrocious Wingmare

Flying
When Atrocious Wingmare enters the battlefield,
you may sacrifice a non-Eldrazi creature. If you
do, lessen. (Remove a counter from any number of
target permanents and/or players.)
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.)