General Grievous, Unrelenting

When ever a Force Wielder dies put a +1/+1
counter on Grievous equal to its power.
If Grievous dealt damage to it this turn put
double those counter on him instead.
("Force Wielders are Jedi, Sith, and
creatures with force counters on them.")
If Grievous would be destroyed while it has a
counter on it, instead exile it and return it to
the battle field at the beginning of the next end
step tapped.