Soul King, Brook

Persist (When this permanent is put into a
graveyard from the battlefield, 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.)
Other Pirate creatures you control have undying.
(When a creature with undying 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.)