Rankaa, Ascended Guardian

Menace, Trample
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.)
If Rankaa, Ascended Guardian becomes blocked,
you may pay {3}{p/g} to double their Power or
Toughness until end of turn.
You may pay {5}{p/g}{p/g} to double both.